Find the tangents of the angles of the triangle , and find the angles to the nearest degree.

i dunno how to find their angles and tans

Thanks very much :)

Printable View

- November 18th 2006, 06:21 AM^_^Engineer_Adam^_^need help on Slopes
Find the tangents of the angles of the triangle , and find the angles to the nearest degree.

i dunno how to find their angles and tans

Thanks very much :) - November 18th 2006, 06:39 AMPlato
Do you have the idea of ‘vectors’ to work with?

We can use the arccosine of dot products to find the angles. - November 18th 2006, 08:13 AMearboth
- November 18th 2006, 11:05 AMSoroban
Hello, ^_^Engineer_Adam^_^!

EB had the best solution . . . elegant!

But there is a formula for this problem.

. . Given two lines with slopes and

. . the angle between them is given by: .

Quote:

Find the tangents of the angles of the triangle ,

and find the angles to the nearest degree.

. .

We have: .

Then: .