Posted by Josh G. on Sunday, October 21, 2012 at 1:30am.
use the double angle formula to rewrite.
Trigonometry - Bosnian, Sunday, October 21, 2012 at 2:00am
cos ( 2 x ) = 2 cos ^ 2 ( x ) - 1
6 cos ^ 2 ( x ) - 3 =
3 [ 2 cos ^ 2 ( x ) - 1 ] =
3 sin ( 2 x )
Trigonometry - Reiny, Sunday, October 21, 2012 at 10:27am
=(cosx +sinx)(cosx-sinx) * (cosx + sinx)/(cosx + sinx)
= (cos^2 x + 2sinxcosx + sin^2 x)/(cos^2 x - sin^2 x)
= (1 + sin 2x)/cos 2x
1/cos 2x + sin 2x/cos 2x
= sec 2x + tan 2x
Answer This Question
More Related Questions
- Trigonometry Check - Simplify #3: [cosx-sin(90-x)sinx]/[cosx-cos(180-x)tanx] = [...
- Trig........ - I need to prove that the following is true. Thanks (cosx / 1-sinx...
- Trigonometry. - ( tanx/1-cotx )+ (cotx/1-tanx)= (1+secxcscx) Good one! Generally...
- trigonometry - can i use factoring to simplify this trig identity? the problem ...
- 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 ...
- maths - trigonometry - I've asked about this same question before, and someone ...
- Math - Pre- Clac - Prove that each of these equations is an identity. A) (1 + ...
- trigonometry - how do i simplify (secx - cosx) / sinx? i tried splitting the ...
- Mathematics - Trigonometric Identities - Prove: (tanx)(sinx) / (tanx) + (sinx...