Posted by Emma on Monday, January 7, 2013 at 5:02pm.
Prove that
tanx+cotx=2sec(2x)
Thank you! :)

Trigonometry  Reiny, Monday, January 7, 2013 at 5:14pm
LS = sinx/cosx + cosx/sinx
= (sin^2 x + cos^2 x)/sinxcosx
= 1/(sinxcosx)
= 2/(2sinxcosx)
= 2/sin (2x)
= 2csc (2x)
Your RS = 2sec(2x) which is incorrect
Did you have a typo?

Trigonometry  Emma, Monday, January 7, 2013 at 5:26pm
Yes I had a typo. Thank you!!
(I don't know how to respond to answers besides this....)

Trigonometry  eva, Monday, January 7, 2013 at 6:03pm
Why
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