Question

if angle A is equal to 90 degree then find the value of tan b + c by 2​

Answer 1

if my answer is correct then please say to me thank you

Answer 2

a +b+c=180°

b+c=180°-a

b+c=180-90=90

tan (b+c)/2=tan(90°/2)

tan(b+c)/2=tan45°

=1......... trigonometric table