Posted by June on September 28, 2002 at 18:16:47:
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
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