AM-2634

R-formula

A Math · Secondary 4 · Medium · R-formula

Express

7\sin x + 24\cos x

in the form

R\cos(x - \alpha)

, where

R>0

and

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

. Find the value of

R

.

$25$
$\sqrt{31}$
$\sqrt{400}$
$\sqrt{49}$

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