Rewrite the expression as an equivalent expression that does not contain powers of trigonometric functions greater than 1.f(x) = 8 cos2 x

A. 4 - 4 cos 2x
B. 1 + cos 2x
C. 16 cos x
D. 4 + 4 cos 2x

Answer: D

Mathematics

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Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges. +  +  + ... +  + ...

A. ; 
B. ; 
C. ; 
D. ; 

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Mathematics

Find the derivative of y with respect to the appropriate variable.y = 6 ln x +  sech-1 x

A. 6 ln x - sech-1 x
B.  - 
C.  - 
D.  - 

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Mathematics

Translate to a proportion and solve. Round to the nearest hundredth, if necessary.20 is 2% of what number?

A. 10,000 B. 1,000 C. 40 D. 100

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Mathematics

Solve the quadratic equation using completing the square.x2 + 2x - 99 = 0

A. {-11, 9} B. {11, -9} C. {-11, 1} D. {11, 9}

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Mathematics