Use the fundamental identities to simplify the expression.
A. sin ?
B. tan2?
C. cos3?
D. sec2?
Answer: B
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Solve the problem.Two pipes can fill a large tank in 10 hours. One of the pipes, used alone, takes 15 hours longer than the other to fill the tank. How long would each pipe take to fill the tank alone?
A. 12.5 hr for one 25 hr for the other B. 15 hr for one 30 hr for the other C. 25 hr for one 50 hr for the other D. 10 hr for one 20 hr for the other
Use the half-angle formulas to simplify the given expression.
A. 
cos 3x
B. cos 3x
C. 2 cos 3x
D. 
sin 3x
Subtract.10a3 + 8a2
A. 12a3 + 20a2 B. 8a3 - 4a2 C. 8a3 + 20a2 D. 4a5
Find the domain of the function
a. All real numbers t except t = 0 b. Negative real numbers t c. All real numbers t such that t > 0 d. Non-negative real numbers t e. All real numbers t such that t = 0