Question

(sin 72 +cos18 ) (sin72-cos18)=0

Answer 1

Hi there

Your answer is :-

(sin 72 +cos18 ) (sin72-cos18) = 0

sin 72^2 - cos 18^2 = 0

- 0.371592 = 0

The equality is wrong because LHS not equal to RHS


Thank You