math
posted by Jon .
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(theta3pi/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
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