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Evaluate tan (4) without using a calculator Evaluate 4 sec (20) - 4 tan (20) without using a calculator Evaluate cos(30) sin(60) without using

Evaluate tan (4) without using a calculator Evaluate 4 sec (20) - 4 tan (20) without using a calculator Evaluate cos(30) sin(60) without using a calculator Find the amplitude of f(x) = 9 sin (3x+) Find the period of f(x) = -2 cos(x+4)

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