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Find the angles between the pairs of str...

Find the angles between the pairs of straight lines: `x+sqrt(3)y-5=0\ a n d\ sqrt(3)x+y-7=0`

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Given pairs of straight lines are
`x−ysqrt(3)=5 and 3x+y=7`
Slopes are `m1​=1/sqrt(3)`​ are `m2​=−sqrt(3) `​
Then
, ...
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