√ 1/2 = sine(45)= cosine(45) -Key
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The sine and cosine of acute angles are equal only for 45° sin45° = cos 45° = 1/sqrt(2) = 0.7071
Sine (0) = 0 Sin(30) = 0.5 Sin(45) = 0.7071... Sin(60) = 0.8660.... Sin(90) = 1 Are just a few of the Sine(Trigonometric) values.
at a 45 degree angle, or pi/4
sin-1(0.707) = 44.99134834 or about 45 degrees
a TRIANGLE HAS 180 DEGRESS! a new born knows that! LOL