Posted by **Laken** on Thursday, December 17, 2009 at 10:20pm.

There are two questions of my homework I'm having trouble with.. I think we are supposed to show how they are true. In other words, make one side look exactly like the other one by using the identities.

1. cosX/(1-sinX)=(1+sinX)/cosX

2. (secX+tanX)/(secX-tanX)=(1+2sinX+sin^(2)X)/cos^(2)X)

Please help, thanks

- TRIG -
**Reiny**, Thursday, December 17, 2009 at 10:37pm
for the first, multiply the LS by (1+sinx)/(1+sinx)

It will turn into the RS

2.

LS = (1/cosx + sinx/cosx)/(1/cosx - sinx/cosx)

we have a common denominator

and remember how to divide fractions ...

= (1+sinx)/(1-sinx)

RS = (1+sinx)(1+sinx)/(1 - sin^2 x)

= (1+sinx)(1+sinx)/[(1+sinx)(1+sinx)]

= (1+sinx)/(1-sinx)

= LS

- TRIG -
**Laken**, Thursday, December 17, 2009 at 10:50pm
Thanks!

## Answer this Question

## Related Questions

- graphs2 - x + 2y = -4 How do I graph this?can you please help? I answered this ...
- Oncology Report - Ok, we're are supposed to do a one page annual report on ...
- English - There are 8 word cards on the blackboard. On one side there are ...
- Science 7R - Worksheet (Q5) - ********* Sorry I post too much question but these...
- english stories and discoveries - intiation As opposed to swooping, singing ...
- Algebra II - I am super confused with permutations and combinations. I just don'...
- Algebra - I'm not quite sure about these problems. I know how to do them, but it...
- math - how do you isolate a variable? my teacher gave us questions and we are ...
- English - I have three pictures. In Picture One, there are one green ball and ...
- Trigonometry - Having trouble with true/false questions in Trigonometry. They ...