Can someone explain to me how this is done?
Find the exact of sin 20, cos 20, tan 20 for the angle described below.
The terminal side of 0 lies in quadrant IV
Now to find the sine and tangent. Recall that sine = opposite/hypotenuse and tangent = opposite/adjacent
we are in the fourth quad, so sine and tangent are negative
alternatively, you could use formulas. and