trigonometry - How would a triangle for sin 90 degree look - Mathematics Stack Exchange

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I am studying trigonometry in my school and learned that in a triangle the side opposite to angle theta should be taken as perpendicular side - hypotenuse remains the same and the third remaining s

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trigonometry - Why does sin(90)=1, and not 0? - Mathematics Stack Exchange

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trigonometry - Finding proof for trigonometric ratio of 90+theta - Mathematics Stack Exchange

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