Verify the identity.cos
= -sin x
What will be an ideal response?
cos 
= cos x cos 
- sin x sin 
= (cos x)(0) - (sin x)(1) = - sin x.
Mathematics
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Use l'Hopital's Rule to evaluate the limit.
x sin 
A. 4
B. 
C. 1
D. 0
Mathematics
Solve the problem.By noting the given limits, rewrite the double integral with the order of integration reversed. 
A. 
B. 
C. 
D. 
Mathematics
Let f (x) = 2x + 1, g(x) = 3x - 2. Find the function. (f - g) ( x )
a. 
b. 
c. 
d. 
e. none of these
Mathematics
Find the perimeter. Use 3.14 for ? when needed.
A. 54.84 m B. 61.68 m C. 42.84 m D. 36.84 m
Mathematics