In the triangle ABC, introduce the notations a=|BC|, b=|CA|, c=|AB|,

as well as A=, B= and C= .

Find b , given that a=1, sin()=1/9 and cos()=6/7 .

Answer: b=

I triangeln A ABC infor beteckningarna a = [BC), b = [CA|, c = |AB + samt ZA = a, LB = Boch LC = y Finn b, givet att a = 1, sin a = och cos B = Svar: b =