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समतल 3x + 4y+z + 7 = 0 तथा –x + y- 2z = ...

समतल `3x + 4y+z + 7 = 0` तथा `–x + y- 2z = 5` के मध्य कोण ज्ञात कीजिए।

लिखित उत्तर

Verified by Experts

The correct Answer is:
`theta = cos^(-1)(1/sqrt(156))`
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