SOLUTION: Find the exact value of sin 225 degrees. You must use a sum or difference formula for your solution to be graded
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Question 981306: Find the exact value of sin 225 degrees. You must use a sum or difference formula for your solution to be graded
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
first write as
then we have
use a sum formula
....since ,,, and , we have
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