Question

if cos 0=-4/9 with 0 in quadrant 2, find sin 0

Answer 1

Using those two values you can use pythagorean theorem to help find the missing side. Then just know that sin = opposite/hypotenuse and sin is positive in the 2nd quadrant.

Answer 2

draw a diagram



find x using pythagoras' theorem

then find sin

for the 2nd quadrant the angle will be

\[180 - \theta\]