# Trig Help (finding period/inverses)

• November 13th 2012, 07:32 PM
whittwhitt
Trig Help (finding period/inverses)
How would you find the period of the trig function 2cos1/3x? And sinπx/24?
• November 13th 2012, 07:43 PM
MarkFL
Re: Trig Help (finding period/inverses)
For $y=A\sin(Bx)$ or $y=A\cos(Bx)$, the period $T$ is:

$T=\frac{2\pi}{B}$
• November 13th 2012, 07:45 PM
whittwhitt
Re: Trig Help (finding period/inverses)
Ok, so the period for the first equation is 2pi/(1/3)?
And the second is 2pi/(xpi/24)?
• November 13th 2012, 08:11 PM
MarkFL
Re: Trig Help (finding period/inverses)
For the first, you may simplify by using 1/(1/3) = 3, and for the second, you do not include x, and you may divide out pi, and bring the 24 up to the numerator.