Write(cos² x)(1 + tan² x) in terms of sin x and cos x then simplify.
(a) 1
(b) sin² x
(c) sin x
(d) cos x
(e) -cos² x
(a) 1
Mathematics
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Use the substitution formula to evaluate the integral.
A. 
B. 
C. - 
D. - 
Mathematics
Write the expression without parentheses.-(-9t - 4r - 8s)
A. 9t + 4r + 8s B. -9t - 4r - 8s C. -9t - 4r + 8s D. 9t + 4r - 8s
Mathematics
Simplify the given expression.13t + 10t
A. 23t2
B. 23t
C. 
t
D. 3t
Mathematics
Find the integral.
ln x dx
A. 2.69 B. 4.17 C. -2.15 D. 17.69
Mathematics