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

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

Algebra.Com

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) (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

RELATED QUESTIONS
I need to find the exact value of this! sec^2 (pi/4) - 6 = How do I do... (answered by stanbon)

Find the exact value of the expression. Do not use a calculator. 4 sec pi/6 + 5 cot... (answered by ewatrrr)

How do I go about finding the exact value of... (answered by Edwin McCravy)

How would you go about solving arccos(sin(6)) where 6 is in radians and you cannot use a... (answered by lwsshak3)

Find the exact value of 2 sec pi/4 + 4 cot pi/3 thanks (answered by mathstutor458)

Use an identity to find the exact value of the expression sin(pi/4 +... (answered by lwsshak3)

I need help adding sec and csc! The exact value of the expression is needed. sec... (answered by stanbon)

Find the exact value of the expression.... (answered by jim_thompson5910)

i must find the exact value of six trig functions of pi/4 radians. sin pi/4 csc... (answered by stanbon,CharlesG2)