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Answer on Algebra Question for marry-kitty

Question #38026
What is cosine? how it differs from sine?
Expert's answer
Cosine is a trigonometric function of angle A which equals relation between adjacent line AC and hypotenuse AB in a right triangle ABC. Sine of the angle A equals relation between opposite lien BC and hypotenuse AC. They are related by Pythagorean identity sin^2 A + cos^2 A = 1.

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