From the adjoining figure, find (i) tan x° (ii) x (iii) cos x° (iv) use sin x° to find y.

(i) By formula, tan x° = . Hence, tan x° = . (ii) tan x° = ⇒ tan x° = tan 60° ⇒ x = 60. Hence, x = 60. (iii) Substituting value of x in cos x°, we get : ⇒ cos x° = cos 60° ⇒ cos x° = . Hence, cos x° = . (iv) Substituting value of x in sin x°, we get : ⇒ sin x° = sin 60° = . By formula, Hence, y = 2.