Sunday

April 20, 2014

April 20, 2014

Posted by **Trig** on Sunday, November 9, 2008 at 2:16pm.

- Trigonometry -
**Reiny**, Sunday, November 9, 2008 at 3:03pmyour lack of the proper use of brackets make your equation much too ambiguous.

Furthermore, the brackets you do use, make no difference to the meaning.

If they are removed, there is no change in the order of operation, but ....

on the left side, who is divided by cos^2 x ?

is it -8/cos^2 x ? or

(8sinx-8)/cos^2 x or

(3cos^2x + 8sinx-8)/cos^2 x

each would give you a different result, the same is just as confusing on the right side.

- Trigonometry -
**Trig**, Sunday, November 9, 2008 at 3:31pm(3cos^2x + 8sinx-8)/cos^2x = (3sinx-5)/sinx+1

- Trigonometry -
**Reiny**, Sunday, November 9, 2008 at 4:09pmLS = (3(1-sin^x) + 8x - 8)/cos^2x

= (3-3sin^x+8x-8)/cos^2x

= -(3sin^2x - 8x + 5)/((1-sinx)(1+sinx))

= -(3sinx-5)(sinx-1)/((1-sinx)(1+sinx))

= (3sinx-5)(1 - sinx)/((1-sinx)(1+sinx))

= (3sinx-5)/(1+sinx)

= RS

**Related Questions**

Trig - prove the identity (sinX)^6 +(cosX)^6= 1 - 3(sinX)^2 (cosX)^2 sinX^6= ...

Mathematics - Trigonometric Identities - Prove: sin^2x - sin^4x = cos^2x - cos^...

Trig Help - Prove the following: [1+sinx]/[1+cscx]=tanx/secx =[1+sinx]/[1+1/sinx...

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

Trig - Simplify sin x cos^2x-sinx Here's my book's explanation which I don't ...

trig - find the exact solutions 2cos^2x+3sinx=0 the way it stands, that is a "...

Math (trigonometric identities) - I was given 21 questions for homework and I ...

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

Mathematics - Trigonometric Identities - Reiny - Mathematics - Trigonometric ...

maths - trigonometry - I've asked about this same question before, and someone ...