if

sec^2 x - tan^2 x =1

is sec^4 x - tan^4 x =1 or any other bigger even power will also be like this?

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- March 8th 2014, 09:44 AMameerulislamtrig identity question
if

sec^2 x - tan^2 x =1

is sec^4 x - tan^4 x =1 or any other bigger even power will also be like this? - March 8th 2014, 10:02 AMPlatoRe: trig identity question
- March 8th 2014, 10:20 AMameerulislamRe: trig identity question
- March 8th 2014, 10:31 AMameerulislamRe: trig identity question
my original problem was $\int \frac{(3x^3)}{\sqrt {x^2-25}} dx$

used trig substitution technique to substitute $x, x=a sec^2x$ - March 8th 2014, 11:00 AMPlatoRe: trig identity question