AM-2630

R-formula

A Math · Secondary 4 · Medium · R-formula

Given that

5\cos x - 12\sin x = R\sin(x - \alpha)

, where

R>0

and

0^\circ<\alpha<90^\circ

, find the value of

R

.

$13$
$\sqrt{17}$
$\sqrt{170}$
$7$

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