Establish the identity.cos
= -sin x
What will be an ideal response?
cos 
= cos x cos 
- sin x sin 
= (cos x)(0) - (sin x)(1) = - sin x.
Mathematics
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Identify the quadrant in which the point is located.(-13, 5)
A. Quadrant I B. Quadrant II C. Quadrant IV D. Quadrant III
Mathematics
Graph the equation.
?
?
A. ?
B. ?
C. ?
Mathematics
Special products can be illustrated by using areas of rectangles. Use the figure to justify the special product 
Give the monomial that represents the area of the black square.
A. a2 B. 2a C. ab D. b2
Mathematics
Graph the inequality.xy ? 2 
A. 
B. 
C. 
D. 
Mathematics