Question

If, Cos^3(θ)+cos^3(120+θ)+cos^3(240+θ)= αcos(3θ), find the value of α.
a)1/4 b)3/4 c)5/4 d)7/4.
Please solve this and write the complete solution with all the steps.

Answer 1

The answer for your question is b) 3/4