Question

sin and cosine of 290 degrees in radians

Answer 1

?

Answer 2

sin and cosine of an angle is just a number .... (there is no radians)

Answer 3

i need the exact value ...sin and cosin of 930 degrees

Answer 4

290 degrees or 930 ?????

Answer 5

930

Answer 6

Subtract as many 360 degrees as possible from 930.
930 - 360 = 570
570 - 360 = 210
210 degrees is in the third quadrant where both sine and cosine are negative.
The reference angle for 210 degrees is 30 degrees.
\[
\sin(210) = -\sin(30) = -\frac 12 \\
\cos(210) = -\cos(30) = -\frac{\sqrt{3}}{ 2}
\]