Friday

July 25, 2014

July 25, 2014

Posted by **Peter** on Thursday, April 15, 2010 at 5:11am.

(cosx/2-sinx/2)^2=1-sin x

- Pre Calculus -
**Reiny**, Thursday, April 15, 2010 at 8:43amHint:

sin 2A = 2sinAcosA

treat x/2 as A

**Related Questions**

Pre Calculus - Establish the following identity sin 2x/sinx - cos2x/cosx = secx

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

Pre-Calc - Establish the identity. sinx + cosx/sinx - cosx = 1+2sinxcosx/2sin^2x...

Trigonometry. - ( tanx/1-cotx )+ (cotx/1-tanx)= (1+secxcscx) Good one! ...

Pre-Calculus - How would you prove/Verify this Identity. x=theta (cosx+sinx-sin^...

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

Pre-Calc : Verify the Identity - Verify the Identity: sin(x+π)/cos(x+3π...

Pre-calc - prove the identity: (cosx)(tanx + sinx cotx)=sinx+cos(squared)x i ...

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

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