Verify the identity.sin 
= -cos x
What will be an ideal response?
sin 
= sin 
cos x - cos 
sin x = (-1) ? cos x - 0 ? sin x = -cos x
Mathematics
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Find the requested value for the given functions.f(x) = x + 6, g(x) = x - 10 Find (f ? g)(x) and (f ? g)(7).
A. (f ? g)(x) = x2 + 4x - 60; (f ? g)(7) = 17 B. (f ? g)(x) = x2 + 16x + 60; (f ? g)(7) = 221 C. (f ? g)(x) = x2 - 4x - 60; (f ? g)(7) = -39 D. (f ? g)(x) = x2 - 4x + 60; (f ? g)(7) = 81
Mathematics
Solve.A swimmer swims the 200m backstroke in 2.23547 minutes. Round her time to the nearest hundredth.
A. 2.25 minutes B. 2.23 minutes C. 2.235 minutes D. 2.24 minutes
Mathematics
Provide an appropriate response.Find the exact value of 
A. 1 B. 2 C. 0 D. - 2
Mathematics
Solve by completing the square.x2 - 14x + 13 = 0
A. x = ± 
B. x = -13, x = -1
C. x = 1, x = 13
D. x = 1, x = 12
Mathematics