√3 / 2
-√2 / 2
√3 / 3
0
Объяснение:
sin (-1020° ) = sin(-360 * 3 +60) = *sin ( 60 ) = √3 / 2
cos (495° ) = cos ( 360+135 ) = cos ( 135 ) = -√2 / 2
tg (570° ) = tg ( 360+210 ) = tg ( 210 ) = tg ( 180 + 30 ) = - 1/2 / - √3 / 2 = √3 / 3
ctg (270° ) = ctg ( 180 + 90° ) = 0 / - 1 = 0
√3 / 2
-√2 / 2
√3 / 3
0
Объяснение:
sin (-1020° ) = sin(-360 * 3 +60) = *sin ( 60 ) = √3 / 2
cos (495° ) = cos ( 360+135 ) = cos ( 135 ) = -√2 / 2
tg (570° ) = tg ( 360+210 ) = tg ( 210 ) = tg ( 180 + 30 ) = - 1/2 / - √3 / 2 = √3 / 3
ctg (270° ) = ctg ( 180 + 90° ) = 0 / - 1 = 0