Proving trig identities + Pre counter examples  TOPIC_SOLVED

Trigonometric ratios and functions, the unit circle, inverse trig functions, identities, trig graphs, etc.

Proving trig identities + Pre counter examples

Postby ianhendry on Thu Feb 16, 2012 3:28 pm

Please help me prove this trig identity

{{{ (1-secx)/(1+secx) = (cosx-1)/(cosx+1) }}}

this is the middle of a section and they have turned up the gears, i think if i am shown how i will be able to figure the rest out. :popcorn:
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Re: Proving trig identities + Pre counter examples  TOPIC_SOLVED

Postby nona.m.nona on Thu Feb 16, 2012 9:53 pm

ianhendry wrote:Please help me prove this trig identity

{{{ (1-secx)/(1+secx) = (cosx-1)/(cosx+1) }}}

What did you get when you converted the left-hand side to sines and cosines, converted the fractions to common denominators, and simplified?
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