Question

If cosα + cos β + cos γ = sin α + sin β + sin γ = 0 then what is the value of cos 3α + cos 3β + cos 3γ? any body plz help urgentt

Answer 1

If cosα + cos β + cos γ = sin α + sin β + sin γ = 0

= cos (α + β + γ ) =0

then,

cos 3α + cos 3β + cos 3γ

= 3 cos (α + β + γ )

= 3 ×0

= 0