Solve the problem.If f(?) = cos ? and f(a) = - , find the exact value of f(-a).

A. - 
B.
C.
D. - 

Answer: A

Mathematics

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Evaluate the integral.

A. sec 3x tan 3x + ln + C
B. sec 3x tan 3x +  + C
C. sec23x tan 3x + ln + C
D. sec 3x tan 3x - ln + C

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Mathematics

Evaluate.

A. x2 + 2x + 1 B. 2x2 + x + 1 C. x2 + x + 2 D. x2 + x + 1

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Mathematics

If , find ?h?(3.8). ?

A.
B. ?
C. ?
D. ?
E. ?

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Mathematics

Multiply and simplify.( - )

A. 12 
B. 60 
C. 6 - 24
D. 36 - 6

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Mathematics