Question: Given the expression cos (135 -60), use a difference formula to determine the exact value of cos (75). Hint: cos (A - B) =

Given the expression cos (135 -60), use a difference formula to determine

Given the expression cos (135 -60), use a difference formula to determine the exact value of cos (75). Hint: cos (A - B) = cos (A) cos (B) + sin (A) sin (B) 4. Given the expression sin (2.30 ), use a double - angle formula to determine an alternate expression for sin (60).

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