# math

posted by .

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 -

In #5, the angle is in the third quadrant, so the cosine, and hence the secant, is negative.

sec theta = (-√17)/4

• math -

are the rest ok?

• math -

yes

## Similar Questions

State the period and phase shift of the function y=-4tan(1/2x + 3pi/8) a) 2pi, -3pi/4 b) pi, 3pi/8 c) 2pi, 3pi/8 d) pi, -3pi/8 Answer: d 2) What is the equation for the inverse of y=cos x+3: a) y=Arccos(x+3) b) y=Arccos x-3 c) y=Arccos …
2. ### maths

Please can you help me with this question?
3. ### trig

Solve the equation for cos theta-tan theta=0 for greater than or egual to zero but less than 2pi. Write your answer as a multiple of pi, if possible form the following choices: pi , 5pi A. --- ---- 4___ 4 B. pi 3pi 5pi 7pi ----- '----- …
4. ### Analysis

Find the amplitude, period, and phase shift of the functions: f(x)=4sec(x+3pi/2) f(x)=tan((1/3t)-pi) f(x)=-5sin(4t+3pi)
5. ### Trig

1)y=1-tan(3pi-2x) Find period and phase shift 2)y=-sin(5x+3) Find amplitude,period,and phase shift 3)y=1-sin(3pi-2x)Find amplitude,period,and phase shift 4)y=2csc(2x-1)Find period and phase shift 5)Given the graph of y = sin (x), what …

1. Graph y =sec(1/2O-2pi)– 3. the O after the 2 has a slash through it 2. Write an equation for tangent given the period, phase shift, and vertical shift. period = 1/3pi , phase shift = –1/4pi, vertical shift = –5
7. ### trig

Solve cos x-1 = sin^2 x Find all solutions on the interval [0,2pi) a. x=pi, x=pi/2, x= 2pi/3 b. x=3pi/7, x=pi/2, x=2pi/3 c. x=3pi/7, x=3pi/2, x=3pi/2 d. x=pi, x=pi/2, x=3pi/2
8. ### Trigonometry

4. Write the equation of the cosine function with an amplitude of 1/3, a period of 2pi, and a phase shift of 3pi/2. I got 1/3COS(1/2x-3pi), but I really do not think that is correct D: any tips or advice?
9. ### Trig

Find all solutions of the equation in the interval [0,2pi) 2 cos^2 x-cos x = 0 -2cos^2 + cosx + 0 (x+1/2) (x+0/2) (2x+1) (x+0) -1/2,0 2Pi/3, 4pi/3, pi/2, 3pi/2 my teacher circled pi/2 and 3pi/2 What did I do wrong?
10. ### Algebra 2

What values for theta(0 <= theta <= 2pi) satisfy the equation?

More Similar Questions