A.find amplitude, period and phase: 1. y=3cos (2x+ )

2. y=-2cos(2x-( /2))

B. Write the equation of the sine function that has the following characteristics: Amplitude=3, Period= /2, phase shift= -1/3

C. According to the old farmer's almanac, in detroit, michigan, the number of hours of sunlight on the summer solstice of 2014 was 15.27 and the number of hours of sunlight on the winter solstice was 9.07.

1. find sinudial function of the form: y= Asin(wx-)+B

2.predict the sunlight hours on april 1, 91st day of the year

3. Draw a graph of no.1

D. find exact value:

a. 1/(cos(-1))

b. 1/(sin(-2/2))

c.1/sin(sin(9 /8))

d.1/cos(cos(-5 /3))

E. solve this equation: 1/3cos(2x)=2