math

Which trigonometric function requires a domain restriction of [0,pi] to make it invertable?
a. f(x)= sin x
b. f(x)= cos x*******
c. f(x)= tan x
d. f(x)= csc x
e. f(x)= sec x
f. f(x)= cot x

Which of the following points could be the initial point of vector v if it has a magnitude of 10 an the terminal point (-1,5)?
a. (-0.1,0.5)
b. (2,4)
c. (-11,-5)*******
d. (-7,-3)

A baseball player hits a ball at an angle of 52 degree and at a height of 4.8 ft. If the ball's initial velocity after being hit is 150 ft./s and if no one catches the ball, when will it hit the ground? Remember that the acceleration due to gravity is 32 ft./s^2
a. 5.77 seconds
b. 5.82 seconds
c. 7.43 seconds*******
d. 7.39 seconds

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  1. all look good to me

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