Question

cot(C)/(2)=(s(s-c))/(Delta)

Answer 1

Answer:

:

A2+B2=π2−C2

cot(A2+B2)=cot(π2−C2)=tanC2=1cotC2

Apply cot(x+y)=cotxcoty−1cotx+coty

Step-by-step explanation:

It shouldn't be that hard cause you have this two.

cos(A2)sin(A2)+cos(B2)sin(B2)+cos(C2)sin(C2)=cos(A2)sin(A2)×cos(B2)sin(B2)×cos(C2)sin(C2)

A+B+C=180