You can put this solution on YOUR website! Please help me prove this Trig identity:
define opp = opposite side, adj = adjacent side, hyp = hypotenuse
and hypotenuse is side opposite to the right angle in a right triangle
and sohcahtoa --> sin = opp/hyp, cos = adj/hyp, tan = opp/adj
and sin/cos = opp/hyp * hyp/adj = opp/adj = tan
and cos/sin = adj/hyp * hyp/opp = adj/opp = 1/tan = cot
replacing tan and cot
distribute
if circle has radius 1:
triangle 30-60-90 with 30 degree angle at center of circle, and hypotenuse being the radius:
sin 30 = opp/hyp = opp/1 = opp
cos 30 = adj/hyp = adj/1 = adj
Pythagorean Theorem --> opp^2 + adj^2 = hyp^2 --> sin^2 + cos^2 = 1
done
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