Question: In Exercises 1-2, use the given conditions to find the exact values of sin 2u, cos 2u, and tan 2u using the double-angle formulas. 1.

In Exercises 1-2, use the given conditions to find the exact values of sin 2u, cos 2u, and tan 2u using the double-angle formulas.
1. sin u = −3 / 5, 3π / 2 < u < 2π
2. cos u = −4 / 5, π / 2 < u < π

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