In `!ABC` , if 2b = a + c and A - C =`90^(@)` , then sin B equals

In DeltaABC, if 2b =a+ c and A-C=90^(@), then sin B equal All symbols used have usual meaning in Delta ABC.]

In a triangle ABC, if 2b=a+c and A-C=90, then sin B equals

in Delta ABC ,if C=90^(@) then 1+sin A-sin B=

In a triangle ABC, if cos A cos B+sin A sin B sin C=1, then a:b:c is equal to

In Delta ABC, If C=90^(@),1+sin A-sin B=