AM-2743

R-formula

A Math · Secondary 4 · Easy · R-formula

Express

4\sin\theta+3\cos\theta

in the form

R\sin(\theta+\alpha)

, where

R>0

and

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

. What is the value of

R

?

$5$
$\sqrt{7}$
$\sqrt{13}$
$4$

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