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amplitude, period, and phase shift of the function

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Show how certain problems can be worked. Please see the attached file.

1) Find the exact value of the sine, cosine, and tangent of the number, without using a calculator. -13π/4
sin (-13π/4) =
cos (-13π/4) =
tan (-13π/4) =

2) Find sin (t), cos (t), tan (t) when the terminal side of an angle of t radians in standard position passes through the given point. (-2,7)
sin (t) =
cos (t) =
tan (t) =

3) State the amplitude, period, and phase shift of the function.
h(t)= -5cos(2t-π/9)
(phase shift)=

4) If an investment of $2000 grows to $2621.59 in four years with interest compounded annually, what is the interest rate? (Round your answer to one decimal place.)

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This solution clearly assesses the amplitude, period, and phase shift of the function.

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