Which angle is taken as sin and which is cos in triangle?
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sin and cos are not the angle but the ratio between different sides of a right angles triangle
sin = perpendicular : hypotenuse
cos = base : hypotenuse
but theta or alpha or beta or gamma or delta may be the angle between them
sin = perpendicular : hypotenuse
cos = base : hypotenuse
but theta or alpha or beta or gamma or delta may be the angle between them
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