In triangle, `A B Cif2a^2b^2+2b^2c^2=a^4+b^4+c^4,` then angle B is equal to `45^0` (b) `135^0` `120^0` (d) `60^0`

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

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 A B C , if B=30^0a n d\ c=sqrt(3)\ b , then A can be equal to 45^0 (b) 60^0 (c) 90^0 (d) 120^0

If a , b ,\ A are given in a triangle and c_1a n d\ c_2 are two possible values of third side such that c_1^2+c_1c_2+c_2^2=a^2 , then A is equal to 30^0 (b) 60^0 (c) 90^0 (d) 120^0

In a triangle ABC,a=3b and |A-B|= 60^(0) then tan((C)/(2))=

If in a /_\ABC, a^2cos^2A=b^2+c^2, then angle A is (A) less than 45^0 (B) more than of 45^0 and less than 90^0 (C) right angled (D) obtuse angle

Side B C of a triangle A B C has been produced to a point D such that /_120^0dot If /_B=1/2/_A , then /_A is equal to 80^0 (b) 75^0 (c) 60^0 (d) 90^0

a^(2)+b^(2)+4c^(2)=2a+2b-4c+3=0