Use a negative-angle identity to write an equivalent trigonometric expression involving a positive angle.tan 
A. tan 
B. 1 - tan 
C. cot 
D. -tan 
Answer: D
Mathematics
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Use a graphing calculator to perform the indicated multiplication.
A. 
B. 
C. 
D. 
Mathematics
Solve the rational equation. If there is no solution, state this as your answer.
+ 
= - 
A. {3} B. {0} C. {-7} D. no solution
Mathematics
Find the exact value of y, or state that y is undefined.y = cos-1 
A. 
B. 
C. 
D. 
Mathematics
Add or subtract. Simplify your answer to lowest terms.
+ 
A. 
B. 
C. 
D. 
Mathematics