Wednesday

July 30, 2014

July 30, 2014

Posted by **Trevor** on Tuesday, October 13, 2009 at 7:28pm.

1. cos x/(1-sinx)= sec x + tan x

2. (tanx+1)^2=sec^2x + 2tan x

3. csc x = )cot x + tan x)/sec x

4. sin2x - cot x = -cotxcos2x

- Math - Trigonometry -
**Reiny**, Tuesday, October 13, 2009 at 8:04pmHint:

change all trig ratios to sines and cosines.

I will do one for you.

3. csc x = (cot x + tan x)/sec x

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

= (cos^2 x + sin^2 x)/(sinxcosx) * cosx

= (1/(sinxcosx)(cosx)

= 1/sinx

= csc x

= LS

- Math - Trigonometry -
**Anonymous**, Wednesday, February 24, 2010 at 9:42pmI dont know

**Related Questions**

trigonometry repost - Reduce (csc^2 x - sec^2 X) to an expression containing ...

Integration - Intergrate ¡ì sec^3(x) dx could anybody please check this answer. ...

calculus (check my work please) - Not sure if it is right, I have check with the...

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

Math - Trig - I'm trying to verify these trigonometric identities. 1. 1 / [sec(x...

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

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

Trigonometry - Simplify each expression using the fundamental identities. 1. Sec...

more trig.... how fun!!!! - if you can't help me with my first question hopw you...

calculus - find dy/dx y=ln (secx + tanx) Let u= secx + tan x dy/dx= 1/u * du/dx ...