Find the exact value under the given conditions.cos ? = 
, 0 < ? < 
; sin ? = - 
, - 
< ? < 0Find tan(? + ?).
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find the values of x for which the given function is concave up, the values of x for which the function is concave down, and any points of inflection.y = 7x - x3
A. Concave up for x < 0, and x > 1, concave down for 0 < x < 1, points of inflection at (0, 0), (1, 7) B. Concave up for x < 0, concave down for x > 0, point of inflection at (0, 0) C. Concave down for all x, no points of inflection D. Concave down for x < 0, concave up for x > 0, point of inflection at (0, 0)
Mathematics
Graph the ellipse.4(x - 1)2 + 9(y - 2)2 = 36
A. 
B. 
C. 
D. 
Mathematics
Use the power rule and the power of a product or quotient rule to simplify the expression.(3a)2
A. 9a2 B. 6a C. 6a2 D. 9a
Mathematics
Establish the identity.sin
= 
(cos x + sin x)
What will be an ideal response?
Mathematics