Question

Prove that :
sin θ .cos (90° - θ) + cos θ sin (90° - θ).

Answer 1

Answer:

Why are both statements below true in regards of a trigonometric circumference? • sin(90+x)=cos(x) • sin(90−x)=cos(x)

2 votes

The sum formula for sine is:- sin(+)=sin()cos()+sin()cos() Put x ...