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question mark

if the circum radius of a triangle is constant ...then prove that
da/cosA + db/cosB + dc/cosC =0

???? ?????? , 10 Years ago
Grade 12th pass
anser 1 Answers
Saurabh Koranglekar
Dear student

The question is incomplete
Kindly mention the meaning of symbols used

Regards
Last Activity: 6 Years ago
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