Step-by-step explanation:
(2 cos(2x)) / (cot x – tan x)
Multiply top and bottom by sin x cos x:
(2 cos(2x) sin x cos x) / (cos² x – sin² x)
Use double angle formula:
(2 cos(2x) sin x cos x) / (cos(2x))
2 sin x cos x
Use double angle formula:
sin(2x)
X=-3/2. The value of f(-1). All you do is plug the numbers In.
Answer:
Five
Step-by-step explanation:
Write the polynomial in decreasing powers of x
-9x⁷ + 8x⁵ + 2x² + 32x - 8
We see that, although the polynomial is seventh degree, it has only five terms.
