Find the exact value under the given conditions.sin ? = 
, 0 < ? < 
; cos ? = 
, 0 < ? < 
Find cos (? + ?).
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Solve the problem.If a and b are the lengths of the legs of a right triangle and c is the length of the hypotenuse, 
How is dc/dt related to da/dt and db/dt?
A. 
= a
+ b
B. 
= 2a
+ 2b
C. 
= a2
+ b2
D. 
= 
Mathematics
Graph the function.y = -tan x
A. 
B. 
C. 
D. 
Mathematics
Match the polynomial function with the graph.y = -x4 + 4x2
A. 
B. 
C. 
D. 
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Add and subtract as indicated. Simplify and leave the numerator and denominator in your answer in factored form.
+ 
- 
A. 
B. 
C. 3
D. 
Mathematics