Question

write f(x)=sin x+cos x in terms of sin only

Answer 1

\[\bf \cos(2x)=1-2\sin^2(x) \implies \cos(x)=1-2\sin^2\left( \frac{x}{2} \right)\]

Answer 2

@jezabelledisreali

Answer 3

Thanks :)

Answer 4

hey, plz close it...thnk u