help!!

prove....

secX-tanX= 1/(secX+tanX)

then deduce that

0<secX - tanX <(or equal to) 1

for values of x between 0 and pi/2

fianlly..

given that secX- tanX = 1/2

find exact value of X

thanks

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- May 29th 2008, 06:42 AMpookTrig Proof (+more)... VERY QUICKK PLEASE
help!!

prove....

secX-tanX= 1/(secX+tanX)

then deduce that

0<secX - tanX <(or equal to) 1

for values of x between 0 and pi/2

fianlly..

given that secX- tanX = 1/2

find exact value of X

thanks - May 29th 2008, 07:05 AMangel.white
- May 29th 2008, 07:07 AMJonboy
i can help with your first question.

Multiply both sides by :

There's an identity:

Re-arrange that to:

Thus the left side side of becomes one and the proof is complete. :)