2006-11-19 11:16:12 · 4 answers · asked by jimmy f 1 in Science & Mathematics ➔ Mathematics
sin² x + cos² x = 1
Center a unit circle on the origin. Let x be a point on the circle x units of distance around the circle from a starting point of (1,0). [so x is in radians]. Then the horizontal coordinate of x is sin x and the vertical coordinate is cos x, and so by Pythagorean theorem sin² x + cos² x = 1.
2006-11-19 11:23:38 · answer #1 · answered by Philo 7 · 0⤊ 0⤋
Let y = 2x
sin^2(y) + cos^2(y) = 1 so this part is always true (x a real quantity)
2006-11-19 19:19:37 · answer #2 · answered by alrivera_1 4 · 0⤊ 0⤋
I don't know what leve math your in, but I'm pretty sure it's 1; it's the grandfather identity
2006-11-19 19:19:14 · answer #3 · answered by Matt D 2 · 0⤊ 0⤋
are you doing homework?
do you even know what that says?
i don't know the answer?
2006-11-19 19:20:59 · answer #4 · answered by may short stuff 1 · 0⤊ 0⤋