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r1r2r3 = r^(3) cot^(2) ""(A)/(2) cot ^(...

` r_1r_2r_3 = r^(3) cot^(2) ""(A)/(2) cot ^(2) ""( B)/(2) "" cot ^(2) ""(C)/(2) `

Text Solution

Verified by Experts

The correct Answer is:
`r^(3) cot^(2) "" (A)/(2).cot^(2) "" (B)/(2).cot^(2)""(C )/(2)`
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