Question

( frac{operatorname{Cos}(-theta)}{sin (90+theta)} )
( =frac{cos theta}{cos theta}left[begin{array}{c}because cos (-theta)=cos theta operatorname{ard} sin (90+theta) =cos thetaend{array}right. )

# 6. Simplify: cos (-0) sin (90° + 0)

Solution