TS EAMCET 20-July-2022 Shift 2 Solved Paper

Section: Mathematics
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Question : 27 of 160
 
Marks: +1, -0
In a triangle ABC, if ‌
a
tan‌A
=‌
b
tan‌B
=‌
c
tan‌C
then cos2A+cos2B+cos2C=
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