Math Is Fun Forum

kfarnan

Member

Registered: 2010-09-17

Posts: 4

trig identities

1/cos^2x - 1/cot^2x

do you get a solution 1 when completing the identity?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: trig identities

Hi kfarnan;

Yes, I do. That is a valid identity.

Here is how:

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

sameer mishra

Member

Registered: 2010-08-27

Posts: 64

Re: trig identities

hi kfarnan i think at  valu of   x where cos x & cot x =0 then that enequality will't valid
if valid then
{sec^2x-tan^2x}=1,proved