AM-2638

R-formula

A Math · Secondary 4 · Hard · R-formula

Write

5\sin x-12\cos x

in the form

R\sin(x-\alpha)

, where

R>0

and

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

.

$13\sin(x-\tan^{-1}\tfrac{12}{5})$
$13\sin(x+\tan^{-1}\tfrac{12}{5})$
$13\cos(x-\tan^{-1}\tfrac{12}{5})$
$13\cos(x+\tan^{-1}\tfrac{12}{5})$

Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.

Loading problem…