sin(nπ/6) অনুক্রমটির পঞ্চম পদ কোনটি?

A 1/2

B √3/2

D 1

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

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