SOLUTION: Use the fact that the trigonometric functions are periodic to find the exact value of each expression. Do not use a calculator.
Sin 9pi/4
Algebra.Com
Question 616802: Use the fact that the trigonometric functions are periodic to find the exact value of each expression. Do not use a calculator.
Sin 9pi/4
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Use the fact that the trigonometric functions are periodic to find the exact value of each expression. Do not use a calculator.
Sin 9pi/4
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Since (9/4)pi = 2pi + pi/4
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So, sin(9pi/4) = sin(pi/4) = 1/sqrt(2)
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Cheers,
Stan H.
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