AM-2651

R-formula

A Math · Secondary 4 · Medium · R-formula

A curve has equation

y = 4\sin x - 3\cos x

. Express

y

in the form

R\sin(x - \alpha)

, where

R>0

and

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

. What is the value of

R

?

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

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

Loading problem…