sin(-θ) কত?
Solution
Correct Answer: Option A
ত্রিকোণমিতিক সূত্রানুসারে,
→ sin (-θ) = − sin θ
→ cos (−θ) = cos θ
→ tan (−θ) = − tan θ
→ cosec(−θ)= − cosec θ
→ sec (−θ) = sec θ
→ cot (−θ) = − cot θ
→ sin (-θ) = − sin θ
→ cos (−θ) = cos θ
→ tan (−θ) = − tan θ
→ cosec(−θ)= − cosec θ
→ sec (−θ) = sec θ
→ cot (−θ) = − cot θ
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