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
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
shobha , 8 Years ago
Grade 12
Trigonometry> in triabgle ABC if a=26,b=30 and cos C=63...
1 Answers
Nishant Vora
Last Activity: 8 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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