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June 3rd, 2019, 03:44 AM   #1
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Math Focus: सामान्य गणित
Solid angle

There are three vectors with same origin OA, OB and OC

Angle between OA and OB = Y
Angle between OA and OC = X
And they are at right angle.

What is the angle between OB and OC?

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June 3rd, 2019, 03:49 AM   #2
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Either X-Y or Y-X, depending on which of the vectors is in the middle.
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June 3rd, 2019, 04:26 AM   #3
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Is it arccos (cos X . cos Y) ?
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June 3rd, 2019, 11:10 AM   #4
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And they are at right angle.
What does "they" refer to?
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June 4th, 2019, 09:37 AM   #5
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triangle OAB and OAC are in two perpendicular planes
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June 4th, 2019, 02:13 PM   #6
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Is it arccos (cos X . cos Y) ?
Yes.
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