Question

If A+B+C=180° then cotAcotB+cotBcotC+cotCcotA=?

Answer 1

Answer:

1

Step-by-step explanation:

cot60cot60+cot60cot60+cot60cot60

1/√3*1/√3+1/√3*1/√3+1/√3*1/√3

1/3+1/3+1/3

3/3

1