mathsurgently needed
If in a triangle ABC,
c(a+b) Cos B/2 =b(c+a) Cos C/2
then the triangle is :
1. isosceles
2. Right angled
3. isosceles or right angled
4. none of these
I want the explanation
asked by
Anonymous

1. Isosceles
posted by Ritika

Put B=C
posted by Anonymous

Put B=C
posted by Anonymous

AFTER PUTTING AND SIMPLIFYING WE ARE GETTING AB=AC THEN TWO SIDES ARE EQUAL THEN IT IS A ISOSCELES TRIANGLE
posted by Anonymous
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