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Mathematics, 28.01.2020 21:06 stressedstudent1906

Which relationship in the triangle must be true?
sin(b) = sin(a)
sin(b) = cos(90 -b)
cos(b) = sin(180-b)
cos(b) cos(a)


Which relationship in the triangle must be true?  sin(b) = sin(a) sin(b) = cos(90 -b)

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Which relationship in the triangle must be true?
sin(b) = sin(a)
sin(b) = cos(90 -b)
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