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Q1 . Simplify. tan40+tan20/1-tan40tan20 Q2. Identify ALL correct usages of the sum and difference formula for sine, cosine and tangent of11/12 Q3. Use a double-angle

Q1. Simplify.

tan40+tan20/1-tan40tan20

Q2. Identify ALL correct usages of the sum and difference formula for sine, cosine and tangent of11/12

Q3. Use a double-angle formula to evaluate the expression.

sin(10/3)

Q4. Find all exact solutions tocos2x=cosx on [0,]

Q5. Use a double-angle formula to rewrite the expression.

8cos²4

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