trigonometry question

Question

Express u^10cos(x)+1w3sin(x) in the form Ccos(x−?).

 

C=

?=

Answer 1

Whatever the coefficients, we may write this as

Acosx+Bsinx and so as

√(A²+B²)[(A/√(A²+B²))cosx+(B/√(A²+B²))sinx]

Let now cosθ=A/√(A²+B²)  and sinθ=B/√(A²+B²)

the full expression is now

√(A²+B²)cos(x-θ)

You really must clarify the coefficients.