Verify the identity.cos 
= -sin ?
What will be an ideal response?
cos 
= cos 
cos ? + sin 
sin ? = 0 ? cos ? - 1 ? sin ? = - sin ?
Mathematics
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Find the distance between the points. ? (-9, 4), (3, -5) ?
A. 4 B. 15 C. 9 D. 3 E. 225
Mathematics
Add. Simplify, if possible.
+ 
A. 
B. m - 5
C. m + 4
D. m - 4
Mathematics
Graph the pair of parametric equations with the aid of a graphing calculator.x = t - sin t, y = 1 - cos t, -4? ? t ? 4? 
A. 
B. 
C. 
D. 
Mathematics
If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth.7291/2
A. 27 B. 108 C. 13.5 D. 54
Mathematics