Question

trigonometric ratio of 30 degree and 60 degree​

Answer 1

Answer:

Therefore, ∠POB = 30° + 30° = 60°; which shows that each angel of triangle OPQ is 60° . Hence ∆OPQ is equilateral. Therefore, OA = √3a (Since, OA > 0). And cot 30° = 1tan30° = √3

Answer 2

Answer:

Therefore, ∠POB = 30° + 30° = 60°; which shows that each angel of triangle OPQ is 60° . Hence ∆OPQ is equilateral. Therefore, OA = √3a (Since, OA > 0). And cot 30° = 1tan30° = √3.