Michael J. answered • 10/22/15
Tutor
5
(5)
Understanding all Sines of Triangles
Distribute the first factor to the terms in the second factor.
(cosxcotx)(secx) - (cosxcotx)(tanx)
Use theses identities:
tanx = sinx / cosx
cotx = cosx / sinx
secx = 1 / cosx
(cosx * (cosx / sin))(1 / (cosx)) - (cosx * (cosx / sinx))((sinx / cosx) =
(cosx / sinx) - cosx
