Find the exact value of the expression.sin 185° cos 65° - cos 185° sin 65°
A. 
B. - 
C. - 
D. 
Answer: D
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Find an equation of the tangent line at x = a.y = x2 - x; a = -3
A. y = -7x + 9 B. y = -7x + 6 C. y = -7x - 6 D. y = -7x - 9
Find the slope of the line tangent to the graph of the function at the given value of x.y = x4 + 2x3 - 2x + 2; x = -1
A. 0 B. -7 C. 2 D. -5
Rewrite the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the trigonometric expression without the use of a calculator.2 sin 112.5° cos 112.5°
A. - 
B. 
C. 
D. - 
By calculating an appropriate number of terms, determine if the series converges or diverges. If it converges, find the limit L and the smallest integer N such that 
for 
otherwise indicate divergence.an = n tan 
A. diverges B. L = 0, N = 28 C. L = 1, N = 6 D. L = 1, N = 28