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Question
If 2 sin x° - 1 = 0 and x° is an acute angle; find:
- sin x°
- x°
- cos x° and tan x°.
Solution
(i) 2 sin x° – 1 = 0
∴ sin x° = `(1)/(2)`
(ii) sin x° = `(1)/(2)`
sin x° = sin 30°
∴ x° = 30°
(iii) cos x° = cos 30° = `(sqrt3)/2`
tax x° = tan 30° = `(1)/(sqrt3)`
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