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Trigonometry Midterm - Part 2 of 2
SAMPLE

This is a sample practice test.

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5. Inverse Trigonometric Functions and Basic Trigonometric Equations / Evaluate Composite Trig Functions / Problem 15

Determine the exact value of the expression without using a calculator.
cos(2arctan8413)\cos\left(2\arctan\frac{84}{13}\right)

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