Sunday

April 20, 2014

April 20, 2014

Posted by **Matthew** on Sunday, May 19, 2013 at 6:23am.

Sin2x - sinx/cosx + cos2x= sinx/cosx + 1

- Math -
**Reiny**, Sunday, May 19, 2013 at 8:00amYou typed it incorrectly, you must mean:

(sin(2x) - sinx)/(cosx + cos(2x)) = sinx/(cosx + 1)

LS = (2sinxcosx - sinx)/(cosx + 2cos^2 x - 1)

= sinx(2cosx -1)/( (2cosx - 1)(cosx+1) )

= sinx/(cosx + 1)

= RS

**Related Questions**

Trig - Verify the identity: tanx(cos2x) = sin2x - tanx Left Side = (sinx/cosx)(...

Math - Pre- Clac - Prove that each of these equations is an identity. A) (1 + ...

Trig........ - I need to prove that the following is true. Thanks (cosx / 1-sinx...

Pre-Calc - Trigonometric Identities Prove: (tanx + secx -1)/(tanx - secx + 1)= ...

Math - Verify the identity . (cscX-cotX)^2=1-cosX/1+cosX _______ sorry i cant ...

math - 1. Prove the identity:cosx/1-tanx+sinx/1-cotx=sinx+cosx 2.Prove the ...

Trigonometry Check - Simplify #3: [cosx-sin(90-x)sinx]/[cosx-cos(180-x)tanx] = [...

Math 12 - Simplify #1: cscx(sin^2x+cos^2xtanx)/sinx+cosx = cscx((1)tanx)/sinx+...

Trigonometry - Simplify #1: cscx(sin^2x+cos^2xtanx)/sinx+cosx = cscx((1)tanx)/...

Math - Trig - Double Angles - Prove: sin2x / 1 - cos2x = cotx My Attempt: LS: = ...