Use a half-angle formula to find the exact value of the expression.cos 
A. - 
B. 
C. 
D. - 
Answer: B
Mathematics
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Replace the polar equation with an equivalent Cartesian equation.r2 sin 2? = 26
A. y = 13x
B. y = 
C. y = 
D. y = 26x2
Mathematics
Solve for the indicated variable.V = 
Bh, for h
A. h = 
B. h = 
C. h = 
D. h = 
Mathematics
Solve. Write the answer as a mixed number in simplest form.A pair of boards needs adjustment. One board is 56 inches and the other is 54
inches. Find how much the longer board should be shortened to make both boards the same length.
A. 110
in.
B. 
in.
C. 2
in.
D. 1
in.
Mathematics
Simplify.
A. undefined
B. 28
C. 0
D. 
Mathematics