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

## Answer this Question

## Related Questions

- Math - 1)A piano tuner uses a tuning fork. If middle C has a frequency of 264 ...
- matj - prove that (cotx+tanx)(cotx-tanx) = 1/(sin^2 x) - 1/(cos^x)
- trigonometry - tanx-cotx/tanx+cotx=1-2cos squardx
- math - solve each identity algebraically 1)(1-tanx)/(1-cotx)=-tanx 2)(1+cotx)/(1...
- Pre-Calc - How do I solve this? My work has led me to a dead end. tan(45-x) + ...
- Math - Prove :cosx-cosy= -2sin(x+y/2)sin(x-y/2) Prove: 2cot-2tanx= 4-2sec^2x / ...
- trigonometry - Prove cotx-1/cotx+1=1-sin2x/cos2x
- trig - Verify the trigonometric identity. Please show all steps. tanx-cotx/tanx+...
- trig - verify the identity (tanx+cotx) (1) __________ = ______________ (tanx-...
- Trigonometry - Given that a^2+b^2=2 and that (a/b)= tan(45degee+x), find a and b...