Mathematics, 23.04.2020 20:50 fdougie111

Which Pythagorean identity is correct?
sine squared (theta) + 1 = cosecant squared (theta)
tangent squared (theta) + 1 = secant squared (theta)
1 minus cotangent squared (theta) = cosecant squared (theta)
1 minus cosine squared (theta) = tangent squared (theta)

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Which Pythagorean identity is correct?
sine squared (theta) + 1 = cosecant squared (theta)