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In a triangle A B C ,(r1+r2)/(1+cosC) is...

In a triangle `A B C ,(r_1+r_2)/(1+cosC)` is equal to `(2a b)/(c"Delta")` (b) `((a+b))/(c"Delta")` `(a b c)/(2"Delta")` (d) `(a b c)/("Delta"^2)`

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ALLEN-SOLUTION AND PROPERTIES OF TRIANGLE-All Questions
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  2. Show that ((1)/(r (1))+ (1)/(r(2)))((1)/(r(2))+(1)/(r (3)))((1)/(r (3)...

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  3. In a triangle A B C ,(r1+r2)/(1+cosC) is equal to (2a b)/(c"Delta") (b...

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