SOLUTION: Find the exact value of the expression. sec^2 pi/4 - 6= How would you go about solving this??

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Question 641826:
Find the exact value of the expression.
sec^2 pi/4 - 6=
How would you go about solving this??
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Find the exact value of the expression.
sec^2 pi/4 - 6=
1/cos^2(π/4)-6=
cos (π/4)=√2/2
cos^2(π/4)=2/4=1/2
1/(1/2)-6=2-6=-4
sec^2 pi/4-6=-4