Question: Please show ALL WORK or no credit will be given. 1. Prove the identity. sin 4x = 2 sin 2x cos 2x 2. Solve algebraically

Please show ALL WORK or no credit will be given. 1.

Please show ALL WORK or no credit will be given. 1. Prove the identity. sin 4x = 2 sin 2x cos 2x 2. Solve algebraically for exact solutions in the interval [0, 21(]. Use your grapher only to support your algebraic work. cos 2x + cos x = 0 3. Use half-angle identities to find an exact value without a calculator. COS 75

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