SOLUTION: exact value without a calculator(all numbers are degrees) sin40+sin130+sin220+sin310

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Question 483485: exact value without a calculator(all numbers are degrees)
sin40+sin130+sin220+sin310
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
exact value without a calculator(all numbers are degrees)
sin40+sin130+sin220+sin310
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sin(40) + sin(50) - sin(40) -sin(50)
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= 0
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Cheers,
Stan H.