Complete the sentence so the result is an identity. Let x be any real number.sin (x - 2?) = 

A. tan x
B. cos x
C. 1
D. sin x


Answer: D

Mathematics

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The following question(s) refer(s) to the capture-recapture method: n1 denotes the size of the tagged (captured) sample, n2 denotes the size of the second (recaptured) sample, and k denotes the number of tagged individuals in the second sample.If n1 = 250, n2 = 150, and k = 25, an estimate for the size of the population is

A. 2500. B. 1500. C. 3000. D. 15. E. none of these

Mathematics

Use the quadratic formula to solve the quadratic equation.x2 = -4x + 21

A. x = -7, 3 B. x = -7, - 3 C. x = 7, - 3 D. x = -21, 0

Mathematics

Solve the equation.-5x + 23 = -6x + 10

A. {-14} B. {-12} C. {-7} D. {-13}

Mathematics

Find an equation for the hyperbola described.Foci at (±9, 0); vertex at (-8, 0)

A.  -  = 1
B.  -  = 1
C.  -  = 1
D.  -  = 1

Mathematics