Wednesday

April 16, 2014

April 16, 2014

Posted by **Rebekah** on Monday, February 4, 2013 at 6:52pm.

sin - cos +1/ sin + cos - 1 = sin +1/cos

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

Thanks!!

- Precalc -
**Reiny**, Monday, February 4, 2013 at 7:03pmYour lack of brackets make your equations totally ambiguous.

Secondly your trig ratios have no argument, sin and cos by themselves are meaningless

that's like saying

5 + √

I happen to know the second one , so

(1+ sinØ)/(1 - sinØ) = (secØ + tanØ)^2

LS = (1+ sinØ)/(1 - sinØ) * (1+sinØ)/(1+sinØ)

= (1 + sinØ)^2 /(1 - sin^2Ø)

= (1 + 2sinØ + sin^2 Ø)/ cos^2 Ø

= 1/cos^2 Ø + 2sinØ/cos^2 Ø + sin^2 Ø/cos^2 Ø

= sec^2 Ø + 2tanØsecØ + tan^2 Ø

= (secØ + tanØ)^2

= RS

**Related Questions**

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

tigonometry - expres the following as sums and differences of sines or cosines ...

algebra - Can someone please help me do this problem? That would be great! ...

Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...

trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...

math - Prove that for all real values of a, b, t (theta): (a * cos t + b * sin t...

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 ...

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

math - how would you prove that sin^2(a)-cos^2(b)= sin^2(b)-cos^2(a). i'm not ...