Prove that:

Question

sin^2(20).sin^2(40).sin^2(80)=3/2

Answer 1

Hard to prove something which is not true

LS= (.11697..)(.41317..)(.9698..)
= appr .0469
≠ 3/2

(I assumed your . meant multiplication, and you were in degrees.
It is also false in radians)

Answer 2

It is in degrees m sorry but stil i dnt knw how to prove this

Answer 3

But I showed you that it is NOT true, so you can't prove it to be true.