Thursday

October 2, 2014

October 2, 2014

Posted by **Janine** on Friday, August 5, 2011 at 7:24am.

1) y = 3sin (2x-pi/2)

2) y = -3sin2 (x-pi/4)

3) y = 2cos (2x+pi)

4) y = -2cos2 (x+pi/2)

- Math Trigonometry -
**Reiny**, Friday, August 5, 2011 at 7:43amfor y = a sin (kx) or y = a cos (kx)

the amplitude is |a| and the period is 2π/k

so for the first one, y = 3 sin (2x - π/2)

amplitude is 3 , period = 2π/2 = π

do the others the same way.

- Math Trigonometry -
**drwls**, Friday, August 5, 2011 at 7:48amThe amplitude is the coefficient in front of the trig term. Forget whether it is + or -.

Let a be the number in front of the x.

a = 2 pi/P, so

P = 2 pi/a

For question 1), the amplitude is 3 and the period is pi

**Answer this Question**

**Related Questions**

Advanced Math - Write an equation of the cosine function with amplitude 2, ...

Trig - Find the amplitude, period, and phase shift of the following function: y...

math - state the period, the amplitude and the phase shift of the function y = 1...

Precalculus - 1.Simplify the expression (sin x+cos x)^2 - sin2x 2.Determine the ...

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...

Pre cal. - Write an equation of the sine function with amplitude 3, period 3ð/2...

Trig/Math - 3. f(x)=1/3sin(2/3x-π/4)+4 Find the amplitude, period, phase ...

trig - determine the amplitude,period and phase shift of y=-2cos(pix-3)

Math - Ft is a periodic function with a period of 7 and an amplitude of 3. What ...