could someone help me Brad Paul's answer doesn't work

Posted by June on September 28, 2002 at 19:37:25:

In Reply to: Re: really need help posted by Brad Paul on September 28, 2002 at 18:41:19:

: : the question is find sin 2, cos 2, tan 2.
: : tan x = -sqrt 2 and pi/2 < x < pi
: : How do you find cos and sin when you just know tan, I can't find any examples in the book. This is the full question. I know how to go on from there.
: : Their answer is
: : sin 2 x =-2((sqrt2)/3)
: : cos 2 x = -1/3
: : tan 2 x = 2(sqr(2))Ju

: Use:

: tan(2 x)=2 tan(x)/(1-tan²(x))

: Along with what I wrote before.

Follow Ups:

• perhaps if you would type the problem correctly, you would get a response that makes sense -nt- T.Gracken 20:11:51 09/28/02 (1)
  • Figured it out June 00:01:20 09/29/02 (0)

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