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Mathematics

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Find the value of d2y/dx2 at the point defined by the given value of t.x = 10t2 - 7, y = t5, t = 1

A.
B. - 
C.
D. - 

Mathematics

Solve for x.x : 8 = 1 : 2

A. 4 B. 5 C. 6 D. 2

Mathematics

Evaluate each expression without using a calculator. Give the result in degrees.csc-1 (2)

A. 420° B. 30° C. 60° D. -30°

Mathematics

Solve the problem.Express  as ? + ?, where cos ? and cos ? are known exactly.

A.  + 
B.  + 
C. 2? + 3?
D.  + 

Mathematics