1. **Simplify each expression by using reciprocal, ratio, and Pythagorean identities. (Substitute one identity for another.) Show your work VERTICALLY placing each new expression below the previous one. Y 3. csc 2x - cos 2x csc ²x sin x (csc xsin x) 2. 1 + sec ²x sin² x 4. 1 sin² 0 1 tan²0

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