TRIGONOMETRIYADAN MISOLLAR
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![Misollar yechish
1. Ifodaning qiymatini toping .
sin cossin
22 11112
Yechish
Yechish . .
sinsin
sin cossin
1
2222
22 11112
Qo’llanildi:
Ikkilangan burchksinusi : sin 2 t = 2sin t · cos t
2. Ifodaning qiymatini toping
.
cos cossin
18 9922 22
.
cos cos cos cos
cos sincos
cos cossin
22
18 1822 18 9222
18 9922
18 9922 2222
Qo’llanildi:
Ikkilangan burchak kosinusi : с os 2 t = cos 2
t – sin 2
t
.
sin
cos sin
22
11 11 2
.
sin
sin
sin
cos sin
1
22
22
22
11 11 2
.
cos
cos sin
18
9 9 22 2 2
.
cos cos cos cos
cos sincos
cos cossin
22
18 1822 18 9222
18 9922
18 9922 2222
](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_2.png)
![Misollar yechish
3 . Ifodaning qiymatini toping .
sin cos
27 6333
Yechish .
Yechish .. Qo’llanildi:
Keltirish formulalari : cos ( 90º – t) = sin t
4 . Ifodaning qiymatini toping.
π
sin
π
tg
6 6
3 6
.
sin
sin
sin
cos
sin
cos
33
27
27 33
27
27 90 33
27
63 33
.π
sinπ
tg 3
32 36
21
31
36
6636
Qo’llanildi:
trigonometrik funksiyalar qiymatlari jadvali .
.
sin
cos
27
63 33
.
π
sin
π
tg
6 6
3 6
.
sin
sin
sin
cos
sin
cos
33
27
27 33
27
27 90 33
27
63 33
.
π
sin
π
tg 3
3 2
3 6
2
1
3
1
3 6
6 6
3 6 ](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_3.png)
![Misollar yechish
Yechish ..
.
cos cos
sin sin
sin sin
34
10 1034
10270 109034
260 10034
5. Ifodaning qiymatini toping .
sin sin
260 10034
Использованы формулы приведения:
sin ( 90º + t) = cos t и sin ( 27 0º − t) = − cos t
Решение. 6. Ifodaning qiymatini toping .tgtg 2441545
Qo’llanildi :
а) формулы приведения: tg ( 90º + t) = − ctg t и tg ( 180º + t) = tg t
б) тождество : tg t · ctg t = 1 .
. tg ctg
tg tg tg tg
5 64 64 5
64 180 64 90 5 244 154 5
.
cos cos
sin sin
sin sin
34
10 1034
10270 109034
260 10034
.
sin
sin
260
100 34
. tg tg 244 154 5
. tg ctg
tg tg tg tg
5 64 64 5
64 180 64 90 5 244 154 5
](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_4.png)
![Misollar yechish
Yechish .. 7. Ifodaning qiymatini toping .
sinsin 263173 37
22
.
sincos sinsinsinsin
37
137
8383 37 831808390 37
263173 37
22 2222
Qo’llanildi:
а) keltirish formulasi :
sin ( 90º + t) = cos t и sin ( 180º + t) = − sin t
sin 2
( 180º + t) = ( − sin t) 2
= sin 2
t
б) trigonometrik ayniyat : sin 2
t + cos 2
t = 1 .
.
sin sin 263 173
37
2 2
.
sincos sinsinsinsin
37
137
8383 37 831808390 37
263173 37
22 2222
](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_5.png)
![Misollar yechish
Yechish .. 8. tg t ni toping, agar .π;π
t,tcos
2
23
29 295
.,
tcos tsin
tgt tsinπ;π
tгде,tsin tcostsin tcos
40
5 2
295 29 2 02
23
29 2
29 4 29 4
2925
2929
2925
1
295
11 295
29 2952
2 2
Qo’llanildi: Trig-k munosabatlar : sin 2
t + cos 2
t = 1 va tg t =
. π ;
π
t , t cos
2
2
3
29
29 5.,
tcos tsin
tgt tsinπ;π
tгде,tsin tcostsin tcos
40
5 2
295 29 2 02
23
29 2
29 4 29 4
2925
2929
2925
1
295
11 295
29 295
2
2 2
](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_6.png)
![Misollar yechish
Yechish 9. Agar sin t = − 0,8 teng bo’lsa, − 20cos 2t ifodaning
qiymatini toping ,
.,,,, ,tsintcos
65280202811206402120 8021202120220
2 2
Qo’llanildi:
Trigonometrik munosobatlar : с os 2 t = 1 – 2sin 2
t
1 0. Agar sin 2t = − 0,7 tenglik o’rinli bo’lsa .
t cos
t sin
2 5
4 2
. ,
, , t sin
t cos
t cos t sin
t cos
t sin
56 0
5
8 2
5
7 0 4
5
2 4
2 5
2 2 4
2 5
4 2
Yechish .
Ikkilangan burchakning sinusi : sin 2 t = 2sin t cos t
. , , , ,
, t sin t cos
6 5 28 0 20 28 1 1 20 64 0 2 1 20
8 0 2 1 20 2 1 20 2 20
2 2
t cos
t sin
2 5
4 2
. ,
, , t sin
t cos
t cos t sin
t cos
t sin
56 0
5
8 2
5
7 0 4
5
2 4
2 5
2 2 4
2 5
4 2
](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_7.png)
![Misollar yechish
Yechish 1 1 . Agar 5sin 2
t + 12cos 2
t = 6 teng bo’lsa, tg 2
tni toping ,
.ttg ttg ttgttg ttgttg tcosttg tcostcos tcos
tcos tsin tcos:tcostsin
6 6 12665 16125 1
6125 6125 6125
2 2 22 22 22 22 2
2 2 222
Qaysi formuladan foydalandik : tg 2
t + 1 = .
cos 2
t 1
. t tg
t tg
t tg t tg
t tg t tg
t cos
t tg
t cos t cos
t cos
t cos
t sin
t cos : t cos t sin
6
6
12 6 6 5
1 6 12 5
1
6 12 5
6 12 5
6 12 5
2
2
2 2
2 2
2
2
2 2
2
2
2
2 2 2
](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_8.png)
![.2
cos 5cos 10
cos 5
55 cos 10
5210 cos 5
5 cos 10
210
cos 5
cos cos5
cos sin cos 10
cos sin2
cos cos10
5cos5sin 10sin2cos10
tt
t t ttgt ttgt
tt t
tt tt t
t t
tt tt Misollar yechish
Qo’llanildi: trigometrik munosabatlar : tg t = .1 2. Agar tg t = 5 bo’lsa ifodaning
qiymatini toping ,
t cos t sin
t sin t cos
5 5
10 2 10
Yechish : Kasrning surat maxrajini cost ga bo’lamiz, bu yerda cost
. 2
cos
5
cos
10
cos
5
5 5
cos
10
5 2 10
cos
5
5
cos
10
2 10
cos
5
cos
cos 5
cos
sin
cos
10
cos
sin 2
cos
cos 10
5 cos 5 sin
10 sin 2 cos 10
t
t
t
t
t
tgt
t
tgt
t t
t
t
t
t t
t
t
t
t t
t t
,
t cos t sin
t sin t cos
5 5
10 2 10
](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_9.png)
![
. , tgt
tgt
tgt
t cos
t cos
t cos
t sin
t cos : t cos t sin
t cos t cos t sin t sin
t cos t sin t cos t sin
t cos t sin t cos t sin
t cos t sin
t cos t sin
9 1
10
19
19 10
19 10
19 10
20 2 12
4 2 4 20 12
4 2 1 5 3 4
4
1
4 2
1 5 3
Misollar yechish
Yechish .
Qo’llanildi: trigometrik munosabatlar : tg t = 13. Agar
.
t cos t sin
t cos t sin
4
1
4 2
1 5 3
bo’lsa , tg t ni toping ,
. , tgt
tgt
tgt
t cos
t cos
t cos
t sin
t cos : t cos t sin
t cos t cos t sin t sin
t cos t sin t cos t sin
t cos t sin t cos t sin
t cos t sin
t cos t sin
9 1
10
19
19 10
19 10
19 10
20 2 12
4 2 4 20 12
4 2 1 5 3 4
4
1
4 2
1 5 3
.
t cos t sin
t cos t sin
4
1
4 2
1 5 3
](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_10.png)
![Misollar yechish
Решение. 1 4 Ifodaning qiymatini toping .
π
cos
π
sin
8
13
8
13
2 2
Qaysi formuladan foydalandik :
а) sin 2 t = 2sin t · cos t
б) sin (2 π n ± t ) = ± sin t , bu yerda n ∈ Z
в) sin ( − t ) = − sin t
.
π
sin
π
sin
π
π sin
π
sin
π
sin
π
cos
π
sin
1
2
2
2
4
3
2
4
3
2
4
3
4 2
4
13
2
8
13
2 2
8
13
8
13
2 2
.
π
cos
π
sin
8
13
8
13
2 2
.
π
sin
π
sin
π
π sin
π
sin
π
sin
π
cos
π
sin
1
2
2
2
4
3
2
4
3
2
4
3
4 2
4
13
2
8
13
2 2
8
13
8
13
2 2
](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_11.png)
![. ,
π
cos
π
π cos
π
cos
π
cos
π
sin
π
cos
π
sin
π
cos
5 4
2
9
2
3
3 3
6
27
6
2 27
6
13
27
12
13
2 27
12
13
12
13
27
12
13
27
12
13
27 2 2 2 2
Misollar yechish
Yechish . 15. Ifodaning qiymatini toping
.
π
sin
π
cos
12
13
27
12
13
27 2 2
Qaysi formuladan foydalandik
а) cos 2 t = cos 2
t – sin 2
t .
б) cos (2 π n ± t ) = cos t , bu yerda n ∈ Z
. ,
π
cos
π
π cos
π
cos
π
cos
π
sin
π
cos
π
sin
π
cos
5 4
2
9
2
3
3 3
6
27
6
2 27
6
13
27
12
13
2 27
12
13
12
13
27
12
13
27
12
13
27 2 2 2 2
.
π
sin
π
cos
12
13
27
12
13
27 2 2 ](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_12.png)
![•
. Sizga omad
tilayman!
Siz har doim
omadlisiz!](/data/documents/c8fa372a-e989-4cf0-8f7a-d3499c1538ac/page_13.png)
Misollar yechish 1. Ifodaning qiymatini toping . sin cossin 22 11112 Yechish Yechish . . sinsin sin cossin 1 2222 22 11112 Qo’llanildi: Ikkilangan burchksinusi : sin 2 t = 2sin t · cos t 2. Ifodaning qiymatini toping . cos cossin 18 9922 22 . cos cos cos cos cos sincos cos cossin 22 18 1822 18 9222 18 9922 18 9922 2222 Qo’llanildi: Ikkilangan burchak kosinusi : с os 2 t = cos 2 t – sin 2 t . sin cos sin 22 11 11 2 . sin sin sin cos sin 1 22 22 22 11 11 2 . cos cos sin 18 9 9 22 2 2 . cos cos cos cos cos sincos cos cossin 22 18 1822 18 9222 18 9922 18 9922 2222
Misollar yechish 3 . Ifodaning qiymatini toping . sin cos 27 6333 Yechish . Yechish .. Qo’llanildi: Keltirish formulalari : cos ( 90º – t) = sin t 4 . Ifodaning qiymatini toping. π sin π tg 6 6 3 6 . sin sin sin cos sin cos 33 27 27 33 27 27 90 33 27 63 33 .π sinπ tg 3 32 36 21 31 36 6636 Qo’llanildi: trigonometrik funksiyalar qiymatlari jadvali . . sin cos 27 63 33 . π sin π tg 6 6 3 6 . sin sin sin cos sin cos 33 27 27 33 27 27 90 33 27 63 33 . π sin π tg 3 3 2 3 6 2 1 3 1 3 6 6 6 3 6
Misollar yechish Yechish .. . cos cos sin sin sin sin 34 10 1034 10270 109034 260 10034 5. Ifodaning qiymatini toping . sin sin 260 10034 Использованы формулы приведения: sin ( 90º + t) = cos t и sin ( 27 0º − t) = − cos t Решение. 6. Ifodaning qiymatini toping .tgtg 2441545 Qo’llanildi : а) формулы приведения: tg ( 90º + t) = − ctg t и tg ( 180º + t) = tg t б) тождество : tg t · ctg t = 1 . . tg ctg tg tg tg tg 5 64 64 5 64 180 64 90 5 244 154 5 . cos cos sin sin sin sin 34 10 1034 10270 109034 260 10034 . sin sin 260 100 34 . tg tg 244 154 5 . tg ctg tg tg tg tg 5 64 64 5 64 180 64 90 5 244 154 5
Misollar yechish Yechish .. 7. Ifodaning qiymatini toping . sinsin 263173 37 22 . sincos sinsinsinsin 37 137 8383 37 831808390 37 263173 37 22 2222 Qo’llanildi: а) keltirish formulasi : sin ( 90º + t) = cos t и sin ( 180º + t) = − sin t sin 2 ( 180º + t) = ( − sin t) 2 = sin 2 t б) trigonometrik ayniyat : sin 2 t + cos 2 t = 1 . . sin sin 263 173 37 2 2 . sincos sinsinsinsin 37 137 8383 37 831808390 37 263173 37 22 2222