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in triabgle ABC if a=26,b=30 and cos C=63/65 rhen r 2= a)65/64 b)4/65 c)48 d)16

in triabgle ABC if a=26,b=30 and cos C=63/65 rhen r2=
a)65/64  b)4/65  c)48  d)16

Grade:12

1 Answers

Nishant Vora IIT Patna
askIITians Faculty 2467 Points
7 years ago
WE can find out area of triangle delta = ½ ab sin C

And then r2 = delta / s (s-b)

Thanks

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