AM-2469

R-formula

A Math · Secondary 4 · Medium · R-formula

The curve

y = 4\sin x - 3\cos x

can be written in the form

R\sin(x+\alpha)

, where

R>0

and

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

. Find the value of

R

.

$5$
$1$
$\sqrt{7}$
$\sqrt{13}$

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