SOLUTION: Use an identity to find the exact value of each expression:
Note: You are not allowed to use decimals in your answer.
cos(271)cos(61)+sin(271)sin(61)=
cos(105)cos(225)ͨ
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Question 961738: Use an identity to find the exact value of each expression:
Note: You are not allowed to use decimals in your answer.
cos(271)cos(61)+sin(271)sin(61)=
cos(105)cos(225)−sin(105)sin(225)=
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Use these formulas,
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