In an acute triangle ABC if `2a^2b^2 + 2b^2c^2 = a^4 + b^4 + c^4`, then angle

In an acute triangle ABC if 2a^(2)b^(2)+2b^(2)c^(2)=a^(4)+b^(4)+c^(4), then angle

In triangle, ABC if 2a^(2) b^(2) + 2b^(2) c^(2) = a^(4) + b^(4) + c^(4) , then angle B is equal to

In triangle,ABC if 2a^(2)b^(2)+2b^(2)c^(2)=a^(4)+b^(4)+c^(4) then angle B is equal to 45^(0)(b)135^(0)120^(@)(d)60^(@)

In a triangle ABC if a^4+b^4+c^4=2c^2(a^2+b^2) , then angle C is equal to (A) 60^0 (B) 120^0 (C) 45^0 (D) 135^0

In a triangle ABC, if a=2,b=4,c=5 then cosB=

In a triangle ABC, if a=2,b=4,c=5 then cosA=

In Delta ABC , if b^(2) + c^(2) - a^(2) = bc, then angle A = __________.

In a triangle ABC, if a = 2, b = 3 and c=4 , then cos A is equal to

Statement-1: In a triangle ABC, if sin^(2)A + sin^(2)B + sin^(2)C = 2 , then one of the angles must be 90 °. Statement-2: In any triangle ABC cos 2A + cos 2B + cos 2C = -1 - 4 cos A cos B cos C