Decide whether or not the given equation is an identity.cos x tan x = sin x
A. Yes
B. No
Answer: A
Mathematics
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Combine like terms.-9y3 + 6y3
A. 3y3 B. 3y6 C. -3y6 D. -3y3
Mathematics
Use the graph to find the standard equation of the circle.
A. x2 + y2 = 16 B. x2 + y2 = 64 C. x2 + y2 = 36 D. x2 + y2 = 8
Mathematics
Use a power-reducing identity to find the exact value of the expression.cos2 (-22.5°)
A. 
B. 
C. 
D. 
Mathematics
Solve the inequality and graph the solution.-4 ? 
A. n ? -16
B. n < -16
C. n > -16
D. n ? -16
Mathematics