<PRE><B>Question 289100</B>
find the exact value of six trig functions of pi/4 radians.
Draw a 45/45/90 right triangle
Let the hypotenuse be 1.
Then, using Pytagoras, each side is sqrt(2)
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sin (pi/4) = 1/sqrt(2) 
csc pi/4 = sqrt(2)/1 = sqrt(2)
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cos (pi/4) = 1/sqrt(2) 
sec (pi/4) = sqrt(2)
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tan (pi/4)= sqrt(2)/sqrt(2) = 1
cot (pi/4)= sqrt(2)/sqrt(2) = 1
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Cheers,
Stan H.
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