Inverse Tangent function
- To: mathgroup at smc.vnet.net
- Subject: [mg79970] Inverse Tangent function
- From: "Boen S. Liong" <mr_bean_curdy at yahoo.com>
- Date: Fri, 10 Aug 2007 01:38:13 -0400 (EDT)
Let w1 = tan-1(x) i.e. inverse tangent of x or tan(w1) = x
w2 = tan-1(y) i.e. tan(y) = w2
and w3 = w2- w1
problem: find tan(w3) in term of x and y.
or better yet:
let x= x1/z1
and y= y1/z1
problem:find tan(w3) in term of x and y.
I know the formula for tan( u+v) or tan(u-v). but please help for the
above. thank you.
Boen S. Liong
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