Bayarystanov AO 2008 work №5 option 5
A₁ (9; 5; 5) with four points; А₂ (–3; 7; 1); А₃ (5; 7; 8); А₄ (6; 9; 2). It is necessary to find: a) the equation of the plane А₁А₂А₃; b) the equation of the salt AAA; c) the equation of the salt A₄M perpendicular to the plane А₁А₂А₃; d) the equation of the salt A₄N, which is parallel to the salt A₁A₂; e) calculate the sine of the angle between the plane А₁А₂А₃ and the salt А₁А₄; e) Calculate the cosine of the angle between the axis coordinate plane and the plane А₁А₂А₃.

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