Trigonometrik tengsizliklarni yechish

cos x ≥ a cos x ≤ a |a| ≤ 1Trigonometrik tengsizliklarni yechishning umumiy hollari - arccos a + 2 ?????? n ≤ x ≤ arccos a + 2 ?????? n arccos a + 2 ?????? n ≤ x ≤ 2 ?????? - arccos a + 2 ?????? n

Xususiy hollarda cos x ≥ 0 cos x ≤ 0 - /2 + ?????? 2 ?????? n ≤ x ≤ /2 ?????? + 2 ?????? n ?????? /2 + 2 ?????? n ≤ x ≤ 3 /2 ?????? + 2 ?????? n

Xususiy hollarda ( а = -1 uchun ) 1) cos x ≥ 1 2) cos x > 1 1) X = 2?????? n 2) yechimi yo'q 1) cos x ≤ 1 2 ) cos x < 1 1) X € R 2) X € R , кроме 2 ?????? n

Xususiy hollarda : a > 1 (a < - 1) cos x ≥ a cos x ≤ a Yechimi yo’q (Х € R ) Х € R (yechimi yo’q )