TS EAMCET 18-July-2022 Shift 1 Solved Paper

Section: Mathematics
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Question : 26 of 160
 
Marks: +1, -0
In a triangle ABC, if (b+c)2sin2‌
A
2
+(b−c)2cos2‌
A
2
=K(1−cos‌2‌A)
, then K=
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