Pre Calculus
posted by Peter .
Establish the identity
tanx/2=cscxcotx

cscx  cotx = (1  cosx)/sinx
That is the standard formula for tan x/2.
For a proof of that, see
http://oakroadsystems.com/twt/double.htm#TanHalf
posted by Peter .
Establish the identity
tanx/2=cscxcotx
cscx  cotx = (1  cosx)/sinx
That is the standard formula for tan x/2.
For a proof of that, see
http://oakroadsystems.com/twt/double.htm#TanHalf