Friday

October 31, 2014

October 31, 2014

Posted by **noel** on Friday, June 22, 2012 at 5:06pm.

1. tanx = sinx + sin^2x/cosx(1+sinx)

2. cos^3+(cosx)(sin^2x) = 1/secx

- trigonometric identities -
**Reiny**, Friday, June 22, 2012 at 5:14pm1. The way you typed it, the identity is false, but I am sure you meant

tanx = (sinx + sin^2x)/(cosx(1 + sinx))

RS = sinx(1 + sinx) / (cosx(1+sinx))

= sinx/cosx

= tanx

= LS

2. LS = cosx(cos^2x + sin^2x)

= (cosx)(1)

= cosx

RS = 1/secx

= cosx

= LS

**Answer this Question**

**Related Questions**

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

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

Simplifying with Trigonometry Identities - Hi, I am a senior in High School ...

Precalculus/Trig - I can't seem to prove these trig identities and would really ...

Mathematics - Trigonometric Identities - Prove: (tanx)(sinx) / (tanx) + (sinx...

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

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

Mathematics - Trigonometric Identities - Prove: sinx + tanx = tanx (1 + cosx) ...

Math, please help - Which of the following are trigonometric identities? (Can be...

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