Monday

April 21, 2014

April 21, 2014

Posted by **RUDY** on Thursday, December 13, 2012 at 10:58am.

11. Prove that tanλ cos^2λ +sin^2λ/sinλ = cos λ + sin λ.

12. Prove that 1+tanθ/1+tanθ = sec^2θ+2tanθ/ 1-tan^2θ.

21. Prove that sin^2w-cos^2w/ tan w sin w + cos w tan w = cos w – cot w cos w.

- trigo math -
**Steve**, Thursday, December 13, 2012 at 11:17amtan*sin+cos

= sin^2/cos + cos

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

= 1/cos

= sec

(tan*cos^2 + sin^2)/sin

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

= sin(cos+sin)/sin

= cos+sin

I think you mean

(1+tan)/(1-tan)

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

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

= (sec^2+2tan)/(1-tan^2)

the last one needs some parentheses. Too complicated and ambiguous

**Related Questions**

Trigonometry desperate help, clueless girl here - 2. solve cos 2x-3sin x cos 2x...

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

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

precalculus - For each of the following determine whether or not it is an ...

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

mathematics - 1.)Sin^-1(x)+Sin^-1(y)+Sin^-1(z)= pie Prove that X.root(1-y^2)+y....

trig help much appreciated! :)) - 1. Find the complete exact solution of sin x...

math - Prove these identites I really need help with these I dont understand ...

math - Prove these identites I really need help with these I dont understand how...

Math - Prove these identites I really need help with these I dont understand ...