Question

f(x) = cos ^x theta + sin ^x theta , find 3f(4)- 2f(6)

Answer 1

\[f(x)=\cos^x\theta+\sin^x\theta\]
For \(f(4)\), wherever you see an \(x\) in the above function, you replace it with a 4:
\[f(4)=\cos^4\theta+\sin^4\theta\]
\(f(6)\) is found similarly; replace \(x\) with 6.

Answer 2

and then? i understood that part, but i don't know what to do next