Posted by **Tabby** on Monday, January 10, 2011 at 6:25pm.

Write the equation of the cosine function with an amplitude of 1, a period of 3pi/7, a phase shift of -pi/5, and a vertical shift of 2 units down.

- Trig/Math -
**Reiny**, Monday, January 10, 2011 at 7:02pm
The only actual calculation you have to do deals witht the period.

period = 2π/k

3π/7 = 2π/k

k =

I am also not clear about your information re phase shift,

I will assume that by " a phase shift of -π/5" you mean a shift of π/5 to the left.

If you meant the opposite, just change the sign for the phase shift in my answer.

y = cos(14/3)(Ø + π/5) - 2

- Trig/Math -
**Tabby**, Monday, January 10, 2011 at 7:38pm
i didnt mean to put a negative sign

## Answer this Question

## Related Questions

- Math/Trig - Write the sine function with an amplitude of 1/4, a period of 3pi, ...
- Trig - 4. Write the equation of the cosine function with an amplitude of 1/3, a ...
- Trigonometry - Write an equation of the cosine function with the given amplitude...
- trig - Write the equation of the sine function with an amplitude of, a period of...
- Trig - Write the equation of the sine function with an amplitude of 1/7, a ...
- Trig/Math - f(x)=1/3sin(2/3x-π/4)+4 Find the amplitude, period, phase shift...
- Trig/Math - f(x)=1/3sin(2/3x-π/4)+4 Find the amplitude, period, phase shift...
- Trigonometry - Write the equation of a sine wave (also called sine curve) given...
- Math/Trig - Write an equation for a cosine function with an amplitude of 2/3 , a...
- Calculus. Please!! i need help so bad!!! - 1. Graph y =sec(1/2O-2pi)– 3. the O ...

More Related Questions