Friday
April 18, 2014

Homework Help: Trigonometry

Posted by Cassie on Saturday, April 9, 2011 at 3:03pm.

a. Find the exact value of
sin (theta - pi/6)

b. Find the exact value of
cos (theta - pi/4)

c. For what numbers x, -2pi less than or equal to x less than or equal to 2pi does cos x = -1

d. What is the range of the cosine function?

e. For what numbers x, -pi less than or equal to x less than or equal to pi is the graph of y = cos x increasing?

f. Given: tan alpha = -4/3,
pi/2 < alpha , pi and
cos beta = 1/2, 3pi/2 < beta , 2 pi.
Find: tan (alpha-beta)

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