Verify the identity.cos(? - ?) - cos(? + ?) = 2 sin ? sin ?
What will be an ideal response?
cos (? - ?) - cos (? + ?) = cos ? cos ? + sin ? sin ? - ( cos ? cos ? - sin ? sin ?) = 2 sin ? sin ?.
Mathematics
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Use the power rule and the power of a product or quotient rule to simplify the expression.
2
A. 
B. 
C. 
D. 
Mathematics
Simplify. (Assume all variables are nonzero.)
4
A. 
B. 
C. 
D. 
Mathematics
Find the best buy (based on cost per unit).Brand A: 12 oz for $3.96Brand B: 16 oz for $5.60
A. Brand B B. Not enough information C. Brand A D. Equal value
Mathematics
Solve the problem.The work W (in joules) done by a force F (in newtons) moving an object through a distance x (in meters) is given by W = 
. Find a formula for W, if F = kx and k is a constant.
A. W = k + C
B. W = 
+ C
C. W = kx2 + C
D. W = 
+ C
Mathematics