Find the exact value of the expression.cos  sin  - cos  sin 

A.
B.
C.
D. 1


Answer: C

Mathematics

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Solve the polynomial inequality. Express the solution in interval notation.x2 - 4x - 21 ? 0

A. [7, ?) B. [-3, 7] C. (-?, -3] ? [7, ?) D. (-?, -3]

Mathematics

Simplify. Assume that all variables represent non-negative real numbers.

A. -2a2b
B. 2
C. 2ab
D. 2ab

Mathematics

Write a general formula to describe the variation.R varies directly with g and inversely with the square of h; R = 3 when g = 3 and h = 5.

A. R = 5
B. R = 25gh2
C. R = 5
D. R = 25

Mathematics

Verify the identity.cos 4? = 2 cos2(2?) - 1

What will be an ideal response?

Mathematics