Find dr/d?.cos (r?)+ r6 = ?6
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds). s (m)
When is the body standing still?
A. 2 < t < 3, 4 < t < 5, 7 < t < 9 B. t = 3, t = 5, t = 8 C. 8 < t ? 10 D. 1 < t < 2
Mathematics
Write in logarithmic form.62 = 36
A. log6 36 = 2 B. log2 36 = 6 C. log36 6 = 2 D. log6 2 = 36
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, 
< ? < ?Find cos 
.
A. 
B. - 
C. 
D. - 
Mathematics
Solve the inequality.x2 - 4x - 21 ? 0
A. x ? -3 B. -3 ? x ? 7 C. x ? -3 or x ? 7 D. x ? 7
Mathematics