If a projectile (such as a bullet) is fired into the air with an initial velocity v at an angle of elevation ? (see the figure), then the height h of the projectile at time t is given by
?
h = -16t2 + vtsin ?
?
?
Give the equation for the height, if v is 1,600 feet per second and ? is 30°. (Leave your answer in exact value form.)
?
A. 
B. 
C. 
D. 
E. 
Answer: B
Mathematics
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Simplify the root.- 
A. x5
B. - 
C. 
D. -x5
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Find the standard form of the equation of the following conic section.Parabola with its vertex at (1, 9) and that opens to the right. This parabola crosses the x-axis at (82, 0). It is of the form 
A. x = (y - 1)2 + 9 B. x = (y + 9)2 + 1 C. x = (y - 9)2 + 1 D. x = (y - 9)2 - 1
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Prove the identity.
= 
What will be an ideal response?
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Find the exact value of the expression if ? = 30°. Do not use a calculator.g(?) = cos ?Find g(2?).
A. 
B. 
C. 
D. 1
Mathematics