# Math Help - Trigo-equation

1. ## Trigo-equation

Solve in R this equation :
$
2\cos (x)+\sin (x)=2
$

2. Originally Posted by dhiab
Solve in R this equation :
$
2\cos (x)+\sin (x)=2
$
Re-write in the form $\sqrt{5} \sin( x + \phi) = 2$ where $\phi$ is left for you to find.