A. 20 (√6 - √2)
B. 40 (√6 - √2)
C. 40 (√6 + √2)
D. none
In ΔABC , if c2= a2+b2, 2s= a+b+c, then 4s (s-a) (s-b) (s-c) =
In a triangle ABC, if cot A = (x3+x2+x)1/2, cot B= (x+x-1+1)1/2 and cot C= (x-3+x-2+x-1) -1/2 then the triangle is
If A=(1,1) ,B=(4,5) and C=(6,13) then cos A=
In ΔABC , if A=750, B=450, C=√3, then b=
In ΔABC, if a(b cos C + c cos B) =2ka2, then k =
In ΔABC, R2 (sin 2A+sin 2B+sin 2C)=
In ΔABC, if cos2 A+cos2B+ cos2C=3/4, then the triangle is
The angle of elevation of the summit of a mountain at a point A is 450. After walking 200 mt from A towards the mountain along a road included at 150, it is observed that the angle of elevation of the summit is 600. The height of the mountain is
In ΔABC, if sin A: sin C = sin (A-B) :sin (B-C), then a2,b2,c2 are in
In a triangle ABC, (a2-b2-c2) tan A+ (a2-b2+c2) tan B is equal to