Match the given function to its graph.1) y = sin2) y = cos3) y = sin4) y = cosAB?

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A. 1A, 2D, 3C, 4B

B. 1B, 2D, 3C, 4A

C. 1C, 2A, 3B, 4D

D. 1A, 2B, 3C, 4D

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Answer: C

Mathematics

Determine if the relation is a function.

A. No B. Yes

Solve the problem.A projectile is fired from a cliff 100 feet above the water at an inclination of 45° to the horizontal, with a muzzle velocity of 210 feet per second. The height h of the projectile above the water is given by  where x is the horizontal distance of the projectile from the base of the cliff. How far from the base of the cliff is the height of the projectile a maximum?

A. 344.53 ft B. 1133.59 ft C. 444.53 ft D. 689.06 ft

Solve.Which of the pairs of numbers whose sum is 72 has the largest product?

A. 30 and 42 B. 26 and 46 C. 36 and 36 D. 35 and 37

Find the exact value. Do not use a calculator.sec 

A. - 
B.
C. -2
D. -