Mathematics, 17.05.2021 06:30 2000070489

( x cosA + y sinA) ^2 + ( x sinA - y cosA) ^2 = x^2+ y^2

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( x cosA + y sinA) ^2 + ( x sinA - y cosA) ^2 = x^2+ y^2​

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( x cosA + y sinA) ^2 + ( x sinA - y cosA) ^2 = x^2+ y^2