Use the Half-angle Formulas to find the exact value of the trigonometric function. cos 165°

A. - 
B.
C.
D. - 

Answer: A

Mathematics

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For  f(x) = A sin  + D,identify either A, B, C, or D as indicated for the sine function.y = cos Find C.

A. ?
B.
C. - 
D. - ?

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Mathematics

Tell whether the angle is acute, right, obtuse, or straight.

A. Acute B. Right C. Straight D. Obtuse

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Mathematics

Decide whether or not the correct factored form of the polynomial is given.12x2 + 17xt + 6t2(4x - 3t)(3x + 2t)

A. Yes B. No

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Mathematics

Perform the indicated operation and express the number in decimal form (without exponents).

A. 0.005 B. 5000 C. -5000 D. -0.005

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Mathematics