Use the given trigonometric function value of ? to find the requested trigonometric function value of the acute angle ?. Rationalize the denominators where necessary.cos ? =    Find sec ?.

A.
B.
C.
D.


Answer: C

Mathematics

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Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(9x - )( - )

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C. 9x2 - 8x  + 10
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Evaluate the expression.(f ? g)(a) when f(x) = 5x + 12 and g(x) = 3x - 1.

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Mathematics