Question

Show that (sin 45)squared+(cos 45)squared =1

Answer 1

We know sin(45 = sqrt(2)/2 and cos(45 = sqrt(2)/2

Answer 2

Okay. Oooooohhhhh. I understand now. Thanks so muh

Answer 3

\[\frac{ \sqrt(2) }{ 2 }^{2}= \frac{ 1 }{2 }\]
(sqrt(2)/2)^2 + (sqrt(2)/2)^2 = 1

Answer 4

Also remember that this is a pythagorean identity
cos^2 + sin^2 = 1