1.) If cos y = 1/2, and 3π/2 < y < 2π, find cos 2y
2.) If tan B = 4/3, and B lies in Quadrant III, find sin(B/2)
3.) The Expression 2sinx cosx is equivalent to which of the following:
a. 2sinx
b. sin 2x
c. cos 2x
d. tan 2x
4.)The expression 2cos^2(15°)-1 has the same value as:
a. sin 15°
b. cos 15°
c. sin 30°
d. cos 30°
5. If siny = -(7/25), find cos 2y
6. If sin B = 0.6, and B terminates in Quadrant II, find cos (B/2)
7. If cos A = -(5/13) and π < A < 3π/2, find cos(1/2)A
2007-03-25
17:32:25
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2 answers
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asked by
Anonymous
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Mathematics