EAMCET Engineering 2009 Solved Paper

Section: Mathematics

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Question : 109 of 160

Marks: +1, -0

In a △ABC ‌

(a+b+c)(b+c−a)(c+a−b)(a+b−c)

4b2c2

equals

cos2A
cos2B
sin‌2A
sin‌2B

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