Let w1 = tan-1(x) i.e. tan(x) = w1

w2 = tan-1(y) i.e. tan(y) = w2

w3 = w1 - w2

problem what is tan(w3) in terms of x and y.
or:

Let w1 = tan-1(x1/z1) i.e. tan(w1) = x1/z1

w2 = tan-1(x2/z2) i.e. tan(w2) = x2/z2

w3 = w1 -w2

what is tan(w3) in term of of x1, x2, z1, z2?

Thank you,

Boen S. Liong

w2 = tan-1(y) i.e. tan(y) = w2

w3 = w1 - w2

problem what is tan(w3) in terms of x and y.

Let w1 = tan-1(x1/z1) i.e. tan(w1) = x1/z1

w2 = tan-1(x2/z2) i.e. tan(w2) = x2/z2

w3 = w1 -w2

what is tan(w3) in term of of x1, x2, z1, z2?

Thank you,

Boen S. Liong