Tuesday

July 22, 2014

July 22, 2014

Posted by **mwewa** on Friday, March 23, 2012 at 5:40am.

- maths -
**Reiny**, Friday, March 23, 2012 at 8:38amlet A = x/2 , then we are proving

tan^2 A = (1-cos(2A))/(1 + cos(2A))

LS = sin^2 A / cos^2 A

RS = (1 - (cos^2 A - sin^2 A) )/(1 + cos^2 A - sin^2 A)

= (1-cos^2 A + sin^2 A) / (1-sin^2 A + cos^2 A)

= (sin^2 A + sin^2 A)/(cos^2 A + cos^2 A)

= 2sin^2 A / (2cos^2 A)

= sin^2 A/cos^2 A

= LS

**Related Questions**

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

Trigonometry - Prove the following trigonometric identities. please give a ...

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

TRIGONOMETRY *(MATHS) - Q.1 Prove the following identities:- (i) tan^3x/1+tan^2x...

Trig....... - I need to prove that the following is true. Thanks (2tanx /1-tan^x...

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

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

Maths - Solve this equation fo rx in the interval 0<=x<=360 3sinxtanx=8 I ...

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

Trig Identities - Proving identities: 1) 1+ 1/tan^2x = 1/sin^2x 2) 2sin^2 x-1 = ...