2 نقطة (نقاط) السؤال 4 The acute angle of intersection of the planes 7 + 2g - 25 = 5, 6ar - 39 + 2 = 8 2 COS 21 3 1 COS 21 1 COS (2) (2) 1 COS - 道道学堂问答

2 نقطة (نقاط) السؤال 4 The acute angle of intersection of the planes 7 + 2g - 25 = 5, 6ar - 39 + 2 = 8 2 COS 21 3 1 COS 21 1 COS (2) (2) 1 COS

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2 نقطة (نقاط) السؤال 4 The acute angle of intersection of the planes 7 + 2g - 25 = 5, 6ar - 39 + 2 = 8 2 COS 21 3 1 COS 21 1 COS (2) (2) 1 COS

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