Use Identities to find the exact value.cos (-165°)
A. 
B. 
C. 
D. 
Answer: B
You might also like to view...
Solve the problem.A rock falls from a tower that is 137.2 m high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground 
Round to the nearest tenth, if necessary.
A. 5.3 sec B. 3841.6 sec C. 11.7 sec D. 11.5 sec
Use the Binomial Theorem to expand the binomial and express the result in simplified form.(x + 4y)3
A. x3 + 12x2y + 48xy2 + 64y3 B. x3 + 4x2y + 8xy + 16xy2 + 32y2 + 64y3 C. x3 + 64y3 D. 3x + 12y
Determine the equation of the line described. Put the answer in the slope-intercept form, if possible.Through (2, -1), perpendicular to -8x - 7y = -23
A. y = - 
x - 
B. y = 
x + 
C. y = - 
x - 
D. y = 
x - 
Use a graphing utility to graph the function over the indicated interval and approximate any local maxima and local minima. If necessary, round answers to two decimal places.f(x) = x2 + 2x - 3; (-5, 5)
A. local maximum at (1, -4) B. local minimum at (1, 4) C. local minimum at (-1, -4) D. local maximum at (-1, 4)