if sin theta = 1/2 then state that cos 3 theta = 4 cos^3 theta - 3 cos theta
Answers
Answered by
3
Sin theta = sin 30
Theta = 30
Cos 90 =4 cos³30- 3cos30
0 = 4 x 3x root 3 /8-3root3/2
0=0
Proved
Theta = 30
Cos 90 =4 cos³30- 3cos30
0 = 4 x 3x root 3 /8-3root3/2
0=0
Proved
Similar questions