when does cos^2 x=sin^2 x?
Originally Posted by Amberosia32 when does cos^2 x=sin^2 x? You should know from the Pythagorean Identity that .
Substituting this into your original equation: , where is an integer representing the number of times you have gone around the unit circle.
Originally Posted by Amberosia32 when does cos^2 x=sin^2 x?
As Cosx gives the horizontal co-ordinate and Sinx gives the vertical co-ordinate of the unit circle centred at the origin,
Cosx=Sinx at for n=0,1,2.....
Cosx= -Sinx at for n=0.1.2....
Hello, Amberosia32! Quote: When does
We have: .
Divide by .
cos^2 x = sin^2 x?