Question

sin(x+10deg)=cos3x then x=?

Answer 1

\[\sin(x+10)=\cos(3x)\]
\[\sin(a+b)=\sin(a)\cos(b)+\sin(b)\cos(a)\]

Answer 2

\[\tan(x)=\frac{\sin(x)}{\cos(x)}\]This is probably all you'll need

Answer 3

but why it became tanx= sinx/cosx ?

Answer 4

No, that's just the equation for tan

Answer 5

how will i distribute it? :)