Posted by **Jon** on Wednesday, February 13, 2008 at 12:40pm.

1)Find the amplitude of y=6cos4theta

A)3/2

B)6

C)4

D)pi/2

I chose B

2)Find the period of y=tan5theta

A)10pi

B)2pi/5

C)5pi

D)pi/5

I chose D

3)Find the phase shift of y=sin(theta-3pi/4).

A)3pi/4

B)-3pi/4

C)4pi/3

D)-4pi/3

I chose A

4)Find the vertical shift of y=-4sec theta+7.

A)-4

B)-7

C)7

D)4

I chose C

5)Find sec theta if tan theta=1/4 and 180 degrees<theta<270 degrees.

A)square root of 15/4

B)-square root of 15/4

C)square root of 17/4

D)-square root of 17/4

I chose C

- math -
**Reiny**, Wednesday, February 13, 2008 at 2:02pm
In #5, the angle is in the third quadrant, so the cosine, and hence the secant, is negative.

sec theta = (-√17)/4

- math -
**Jon**, Wednesday, February 13, 2008 at 2:07pm
are the rest ok?

- math -
**Reiny**, Wednesday, February 13, 2008 at 3:20pm
yes

## Answer This Question

## Related Questions

- maths - Please can you help me with this question? Choose the option which is a ...
- Trig - 1)y=1-tan(3pi-2x) Find period and phase shift 2)y=-sin(5x+3) Find ...
- trig - Solve cos x-1 = sin^2 x Find all solutions on the interval [0,2pi) a. x=...
- Pre-Calculus-check answers - State the period and phase shift of the function y...
- Analysis - Find the amplitude, period, and phase shift of the functions: f(x)=...
- trig - Solve the equation for cos theta-tan theta=0 for greater than or egual to...
- Trigonometry - 4. Write the equation of the cosine function with an amplitude ...
- Calculus. Please!! i need help so bad!!! - 1. Graph y =sec(1/2O-2pi)– 3. the O ...
- Pre-Cal(Please check) - 1) Find all the solutions of the equation in the ...
- Pre-Cal(Please check) - 1) Find all the solutions of the equation in the ...

More Related Questions