Thursday

January 29, 2015

January 29, 2015

Posted by **Jillian** on Tuesday, January 20, 2009 at 3:57pm.

sinē θ = tanē θ / 1 + tanē θ

- Math -
**drwls**, Tuesday, January 20, 2009 at 4:37pmI assume the right side is supposed to be tanē č /(1 + tanē č)

Start by rewriting

1 + tan^2 = (cos^2 + sin^2)/cos^2

= 1 /cos^2

so that

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

Therefore the right side becomes

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

- Math -
**Jillian**, Tuesday, January 20, 2009 at 4:46pmhow did 1 + tan^2 become cos^2 + sin ^2?

- Math -
**Jillian**, Tuesday, January 20, 2009 at 4:54pmoh nevermind i got it thank you.

- Math -
**Jillian**, Wednesday, January 21, 2009 at 5:45pmCool

**Answer this Question**

**Related Questions**

Math - Calculus - The identity below is significant because it relates 3 ...

Trigonometry - 1.Solve tan^2x + tan x 1 = 0 for the principal value(s) to two ...

math - Prove the following identities: a) (cosec θ + cotθ)(cosecθ...

Trig - Verify the given equations: ____1______ + ____1_______ = -2 tanθ tan...

trigonometry hlp me - 6.Prove that tan y cos^2 y + sin^2y/sin y = cos y + sin y...

math trigono - 1. If tanθ = √3 , what is the value of cot ? 2. ...

Trigonometry - Could someone please help me with the following q's I'm having ...

trignonmetry - 6. Prove that tan λ cos^2 λ + sin^2λ/sin λ = ...

Math Question - Given tan θ = -8/5 and sin θ < 0, find sin θ, ...

Trig - Given that csc θ = -4 and tan θ > 0, find the exact value of...