Multiply and simplify.
? 
A. 1
B. 
C. -1
D. 0
Answer: A
Mathematics
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Evaluate the improper integral.
A. 15 B. 0 C. 5 D. 3
Mathematics
A ball is thrown at an angle of 45° to the ground. If the ball lands 30 m away, what was the initial speed of the ball? Let g=9.82m/s.
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Mathematics
A point lying on the terminal side of angle ? is given. Find the exact value of the indicated trigonometric function of ?.(-5, 12) Find sin ?.
A. - 
B. - 
C. 
D. 
Mathematics
Simplify the expression.
A. x15y14 B. -x9y9 C. x9 + y9 D. x9y9
Mathematics