Establish the identity.cos(4?) = cos4 ? - 6 sin2 ? cos2 ? + sin4 ?

What will be an ideal response?

cos(4?) = cos[2(2?)] = cos2(2?) - sin2(2?) =   = cos4 ? - 6 sin2 ? cos2 ? + sin4 ?

Mathematics

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Sketch the graph of the parametric equations. Then set up the appropriate integral to find the length of the curve and use a computer to evaluate it.x = sin 3t, y = cos t, 0 ? t ? 2?

A. L = 10.19

B. L = 13.07

C. L = 2?

D. L = 13.07

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Mathematics

Sketch the graph of the line with the given equation.y + 4 = 0

A.

B.

C.

D.

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Mathematics

Use an integer or rational number to express the number representing change.In one state, the lowest point is 1319 feet below sea level.

A. 1319 B. -1319

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Mathematics

Solve the inequality. Graph your solution on a number line, and write your solution in interval notation. - 9 > -18

A. ?

B.

C.  ? 

D. (-?, ?)

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Mathematics