Question

find the period of function f(x)=cos(3x+5)+7​

Answer 1

$If \: the \: period \: of \: f(x) \: = t$

$Then \: period \: of \: f(ax + d) =\frac{t}{a}$

$Thus \: the \: period \: of \: cos \: x = 2\pi$

$Then \: period \: of \: cos \: (3x + 5) \: \\ is \: \frac{2\pi}{3}$

$༒ \: Hence \: Verified \: ༒$