basic trig: converting power on sec^2(pi/4) to 1

[bhuvaneshnick]

sec^2(pi/4).i dont know how to calculate since we need to convert that power 2 to 1.we have equivalent trigonometric identies for cos^2 and Sin^2 but we dont have for sec^2.so i would i calculate that?

 

[Ishuda]

sec^2(pi/4).i dont know how to calculate since we need to convert that power 2 to 1.we have equivalent trigonometric identies for cos^2 and Sin^2 but we dont have for sec^2.so i would i calculate that?

Use the definition of the secant:
sec(x) = 1/cos(x)

 

[Steven G]

sec^2(pi/4).i dont know how to calculate since we need to convert that power 2 to 1.we have equivalent trigonometric identies for cos^2 and Sin^2 but we dont have for sec^2.so i would i calculate that?

I take it that you do not know what sec^2(pi/4) means. sec^2(pi/4) means [sec (pi/4)]^2 = 1/[cos(pi/4)]^2. So as Ishuda suggested you should first calculate cos(pi/4) and then .....