त्रिभुज ABC मैं सिध्द करें कि `ac cos B - bc cos A = a^(2) - b^(2) `

2(bc cos A+ca cos B+ab cos C)=a^(2)+b^(2)+c^(2)

In any triangle, ABC prove that: ac cos B-bc cos A=a^2-b^2

In a triangle ABC If ( 2 cos A)/a + ( cos B)/b + (2 cos C)/c = a/(bc) + b/(ca) , find the angle A.

In the triangle ABC if (2 cos A)/a + ( cos B)/b + (2 cos C)/c = a/(bc) + b/(ca) find the angle A.

In a triangle ABC , right angled at B, AB = 7 cm and (AC - BC) = 1 cm. The value of (secC + cotA) is : त्रिभुज ABC में, जिसमें B समकोण है, AB = 7 सेमी और (AC - BC) = 1 सेमी है| (secC + cotA) का मान ज्ञात करें|

In triangle ABC , prove that 2(bc cos A +ac cos B +ab cos C)=a^2+b&2+c^2 .

If, in a /_\ ABC , (2 cos A)/a + (cos B)/(b) + (2 cos C)/(c) = a/(bc) + b/(ca) , then: /_A = .....

If, in a /_\ ABC , (2 cos A)/a + (cos B)/(b) + (2 cos C)/(c) = a/(bc) + b/(ca) , then: /_A = .....