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NDA Math Vector Algebra

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Question : 12

Total: 101

ABCDEFGH is a cuboid with base ABCD. Let A(0,0,0),B(12,0,0),C(12,6,0) and G(12,6,4) be the vertices. If α is the angle between AB and AG;β is the angle between AC and AG, then what is the value of cos‌2‌α+cos‌2‌β ?

‌
40
49
‌
64
49
‌
120
49
‌
160
49

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