Posted by Dizzytrig on Tuesday, July 22, 2008 at 11:09am.
how do you veriy
tan x + Cot y
 = tan y + cot x
1tan x cot y
sin^4x + cos^4x = 1 2cos^2x + 2cos^4

verifying identities  Damon, Tuesday, July 22, 2008 at 4:57pm
I get on the right:
sin y / cos y + cos x / sin x
(sin x sin y + cos x cos y) / sin x cos y
sin x sin y/cos x + 1 cos y

sin x cos y/cos x
tan x sin y + cos y

tan x cos y
tan x sin y/sin y + cos y/sin y

tan x cos y/sin y
tan x + cot y

tan x cot y

verifying identities  Damon, Tuesday, July 22, 2008 at 5:00pm
sin^4x + cos^4x = 1 2cos^2x + 2cos^4 this is not complete, assume you mean
2 cos^4 x at the end
sin^4 x = sin^2 x * sin^2 x
=(1  cos^2 x)(1  cos^2 x)
= well I guess that gives it away
Answer This Question
Related Questions
 Trigonometry  Please review and tell me if i did something wrong. Find the ...
 Math  Trig  I'm trying to verify these trigonometric identities. 1. 1 / [sec(x...
 trigonometry repost  Reduce (csc^2 x  sec^2 X) to an expression containing ...
 precalculus  For each of the following determine whether or not it is an ...
 Math  Solve and prove the identity (tan x+ cot (x))/ (tan x  cot(x))= 12cos...
 trig  I do not understand these problems. :S I'd really appreciate the help. ...
 Pre Cal  could someone please tell me what the other angle identity of tan is? ...
 math  how do I simplify these? 1. (Cot/1tan) + (Tan/1Cot)  Tan  Cot 2. (1+...
 verifying trigonometric identities  How do I do these problems? Verify the ...
 TRIG..............  Q.1 Prove the following identities: (i) tan^3x/1+tan^2x + ...
More Related Questions