Simplify.sin4 x - cos4 x

A. - cos 2x
B. cos 2x
C. cos x
D. sin 2x

Answer: A

Mathematics

You might also like to view...

Identify the equation as either an identity or not.2 sin 5x cos x = sin 6x + sin 4x

A. Not an identity B. Identity

View
Mathematics

Simplify.(-2x6y6)(5xy5)(4x6y)

A. 7x13y12 B. 7x36y30 C. -40x36y30 D. -40x13y12

View
Mathematics

Solve the problem.A number increased from 2254 to 9746 . Find the amount of increase.

A. 7492 B. 7484 C. 9492 D. 7404

View
Mathematics

Solve the inequality. Express your answer using interval notation. Graph the solution set.|6k - 5| ? 6

A. (- , )

B. [, ?)

C. (-?, - ] ? [, ?)


D. [- , ]

View
Mathematics