Question

(iii) 2tan 30 is equal to ... 1-tan 30° (A) cos 30° (3) sin 30° (C) tan 30° (D) tan 60% ​

Answer 1

Answer:

cos -1 (1/2) + 2 sin -1 (1/2)

= cos -1 (cos/3) + 2 sin -1 (sin /6)

= (π/3) + 2(π/6)

= (π/3) + (π/3) = 2π/