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17 December, 10:59

Explain why the sine of an acute angle of a right triangle is equal to the cosine of its complement

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  1. 17 December, 14:17
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    To see this relationship, all you need to know is some basic trig.

    consider triangle ABC. the sin (β) = b/c; cos (α) = b/c, therefore sin (β) = cos (α). also, since this is a right triangle, β and α are complements
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