Posted by Alycia on Friday, November 2, 2012 at 7:27am.
I'm only aloud to manipulate one side of the problem and the end result has to match the other side of the equation
Problem 1. sinx + cosx + sinx + tanx + cosxcotx = secx + cscx
Problem 2. ((sinx + cosx)/(1 + tanx))^2 + ((sinx  cos^2x)/(1  cotx))^2 = 1
Problem 3. ((1 + sinx)/cosx) + (cosx/(1 + sinx)) = 2secx

Math  Reiny, Friday, November 2, 2012 at 8:08am
I did the first one, after fixing your typo
http://www.jiskha.com/display.cgi?id=1351823844

Math  Reiny, Friday, November 2, 2012 at 8:19am
#2 does not work for x=30° so there is a typo, or it is not and identity.
#3
LS = (1+sinx)/cosx + cosx/(1+sinx)
using LCD of cosx(1+sinx)
= ( (1+sinx)(1+sinx) + cos^2 x)/(cosx(1+sinx) )
= 1 + 2sinx + sin^2 x + cos^2 x)/(cosx(1+sinx) )
= (2 + 2sinx)/(cosx(1+sinx))
= 2(1+sinx)/(cosx(1+sinx))
= 2/cosx
= 2secx
= RS
Answer This Question
Related Questions
 Math  Im really struggling with these proving identities problems can somebody ...
 Math  Im really struggling with these proving identities problems can somebody ...
 Math  Im really struggling with these proving identities problems can somebody ...
 PreCal  How do I do these questions? I'm supposed to prove them so that both ...
 precal  please help i can't find the answer for this question. i can only ...
 Math  I can only manipulate one side of the equation and the end result should ...
 PreCalc  Trigonometric Identities Prove: (tanx + secx 1)/(tanx  secx + 1)= ...
 Simplifying with Trigonometry Identities  Hi, I am a senior in High School ...
 PreCalculus  How can this identity be proved/verified? cscxsinx=1/(secxtanx) ...
 drwls  My previous question: Verify that (secx/sinx)*(cotx/cscx)=cscx is an ...
More Related Questions