AM-2676

R-formula

A Math · Secondary 4 · Medium · R-formula

Express

7\sin x-24\cos x

in the form

R\sin(x-\alpha)

, where

R>0

and

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

. What is the value of

R

?

25
$\sqrt{31}$
$\sqrt{650}$
$\sqrt{576}$

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