sin(nπ/6) অনুক্রমটির পঞ্চম পদ কোনটি?
Solution
Correct Answer: Option A
sin(nπ/6) অনুক্রমটির পঞ্চম পদ = sin(5π/6) [এখানে n = 5]
এখন,
sin (5π/6)
= sin {(5 × 180°)/6}
= sin 150°
= sin (180° - 30°)
= sin30°
∴ sin (5π/6) = 1/2
এখন,
sin (5π/6)
= sin {(5 × 180°)/6}
= sin 150°
= sin (180° - 30°)
= sin30°
∴ sin (5π/6) = 1/2
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