Question

If a, b, and c are the angles made by a vector with X, Y, Z axis respectively. Then cos^2a + cos^2B + cos^2c is?​

Answer 1

Answer:

-1

Step-by-step explanation:

cos2α+cos2β+cos2γ =2(cos  2  α+cos  2  β+cos  2  γ)−3

=2−3=−1

(∵cos  2  α+cos  2  β+cos  2  γ=1)

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Answer 2

Answer:

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