Prove the identity.
= 
What will be an ideal response?
Answers may vary. One possible solution is:
= 
= sin x cos x = 
.
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Find an antiderivative of the given function.f(x) = 
x5/7
A. 
x12/5
B. 
x12/7
C. 
x12/5
D. 
x12/7
Find the vertex, the y-intercept, and the x-intercepts (if any exist), and graph the function.f(x) = x2 + 2x - 8
A. 
Vertex (- 1, - 9);
x-int = (4,0) and (2, 0);
y-int = (0, -8)
B. 
Vertex (1, - 9);
x-int = (-2,0) and (4, 0);
y-int = (0, 8)
C. 
Vertex (1, - 9);
x-int = (-2,0) and (4, 0);
y-int = (0, -8)
D. 
Vertex (- 1, - 9);
x-int = (-4,0) and (2, 0);
y-int = (0, -8)
Solve the problem.Evaluate f(t) = cot t at t = 
verbally.
A. If ? = 
is in standard position, the terminal side intersects the unit circle at the point 
Therefore, 
B. If ? = 
is in standard position, the terminal side intersects the unit circle at the point 
Therefore, 
is undefined.
C. If ? = 
is in standard position, the terminal side intersects the unit circle at the point 
Therefore, 
D. If ? = 
is in standard position, the terminal side intersects the unit circle at the point 
Therefore, 
is undefined.
Find the sum.20,5334400
A. 58,451 B. 57,351 C. 58,351 D. 59,451