Find the exact value by using a sum or difference identity.tan 105°
A. 
B. -2 - 
C. 
D. 2 + 
Answer: B
Mathematics
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Find the area of the specified region.Inside the circle r = a sin? and outside the cardioid r = a(1 - sin ?), a > 0
A. 
(2? - 3
)
B. 
(6 - ?)
C. 
(4? - 3
)
D. 
(3
- ?)
Mathematics
Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = (cos x)x
A. ln x(cos x)x - 1 B. ln cos x - x tan x C. (cos x)x (ln cos x - x tan x) D. (cos x)x (ln cos x + x cot x)
Mathematics
Solve the rational inequality. Write the solution set using interval notation; then graph the solution set on a number line.
? 0
A. [3, 4)
B. (-?, -7] ? [3, 4)
C. [-7, 3] ? (4, ?)
D. (-?, -7) ? (3, 4)
Mathematics
Write the logarithmic equation in exponential form.2y = ln (-8x)
A. ey = - 4x B. e-8x = 2y C. e2y = -8x D. -8x2y = e
Mathematics