B. Find L{f (t)} using the appropriate formula. Note: a, b, and n are constants. 1. f(1)=(r* -3)' 2. f(1)= cos 3t –- π Hint: Sum and Difference Identities 2 at-2bt 3. f(t) = e"-2o Hint: Laws of Exponents 4. f(1) = 2 sinh (-41) Hint: Definition of hyperbolic sine function 5. f(t)=t cos 2t cos 5t Hint: Product to Sum Identities

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