Find the exact value under the given conditions.sin ? = 
, 0 < ? < 
; cos ? = 
, 0 < ? < 
Find cos (? + ?).
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Determine whether the graphed relation is a function.
A. function B. not a function
Mathematics
Evaluate the derivative of the given function at the given point.2(x2 + y2)2 = 25(x2 - y2); (-3, -1)
A. 
B. - 
C. 
D. - 
Mathematics
Collect like terms.
m + 
n - 
m - 
n
A. 
m + 
n - 
B. - 
m - 
n
C. 
m + 
n
D. 
m - 
n
Mathematics
Solve the problem.A jet plane traveling at a constant speed goes 1200 mi with the wind, then turns around and travels for 1000 mi against the wind. If the speed of the wind is 50 mph and the total flight took 4 hr, find the speed of the plane.
A. 605 mph B. 550 mph C. 435 mph D. 525 mph
Mathematics