AM-2604

R-formula

A Math · Secondary 4 · Medium · R-formula

Express

5\sin x + 12\cos x

in the form

R\sin(x + \alpha)

, where

R > 0

and

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

.

Find the value of

R

.

$13$
$17$
$7$
$\sqrt{119}$

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