Verify the identity.
= 1 + sin ? cos ?
What will be an ideal response?
= 
= sin2 ? + sin ? cos ?+ cos2 ? 
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Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 
, y = - x + 6
A. 16?
B. 72?
C. 20?
D. 
?
Solve the problem.A rectangular photograph measures 27 inches by 42 inches. The photographer wishes to frame the photograph with a frame x inches wide, as shown. Write an expression in factored form for the area of the frame in terms of x. 
A. 4x(x - 69) B. 2(x + 21)(2x + 27) C. 2(2x2 + 69x + 1134) D. 2x(2x + 69)
Solve the equation.
= 
A. {- 5, - 1}
B. {- 5, 
}
C. ?
D. {5, 2}
Fill in the blank with one of the words listed below.
A(n) 
is a point of the graph where the graph crosses the x-axis.
A. x-intercept B. y-intercept C. x-axis D. y-axis