Use a double-angle formula to rewrite the expression.
?
10 cos2 x - 5
?

A. 5 cos x
B. ?cos 5x
C. ?10 cos 2x
D. ?10 cos x
E. ?5 cos 2x

Answer: E

Mathematics

You might also like to view...

Solve the equation.5x2 - 35x + 60 = 0

A. {-4, -3} B. {3, 4} C. {3, 5, 4} D. {0, 3, 4}

View
Mathematics

Complete.2300 ?L =    mL

A. 23000 B. 2.3 C. 230 D. 0.23

View
Mathematics

Subtract. - 9

A.
B. 8
C. 10
D.

View
Mathematics

Add.

A. 1625 B. 1705 C. 1726 D. 1615

View
Mathematics