I need assistance in what identities I am able to utilize in order to resolve or simplify the double angle identity. I have tried converting the cos2x in all its three forms in order to simplify, however, nothing seems to function.
the cosine of double argument formula cos 2x = cos2x
and factor it by using the difference of squares formula cos 2x =
= (cos x – sinx)(cos x + sinx).
– cos2x / (sin x – cos x)2
= (sin x – cosx)(sin x + cosx) / (sin x – cos
x + cosx)
/ (sin x – cos x).
If necessary, continue by dividing both the numerator and denominator by cos x
(tan x + 1) / (tan x - 1) = note that tan(π/4)
- (tan x + tan(π/4)) / (1 - tan x * tan(π/4) ) = use the tangent of the sum formula
- tan(x + π/4)
Content will be erased after question is completed.
Enter the email address associated with your account, and we will email you a link to reset your password.
Forgot your password?