Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 
B. 
C. 1
D. 
Answer: D
Mathematics
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Find A-1 without a calculator.A = 
A. A-1 = 
B. A-1 = 
C. A-1 = 
Mathematics
Evaluate the algebraic expression for the given values of the variables.x3 - 3y for x = 8 and y = 2
A. 506 B. 18 C. 30 D. 518
Mathematics
Find the product.(-2m2)(4m3)
A. -8m B. 8m6 C. -8m5 D. 8m
Mathematics
A plane flying horizontally at an altitude of 1 mi and a speed of 550 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station.
a. ? 476 mi/h b. ? 670 mi/h c. ? 455 mi/h d. ? 570 mi/h e. ? 495 mi/h
Mathematics