sinθ = √3/2 হলে, cotθ এর মান নিচের কোনটি?

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A

1/√2

B

1/√3

C

1/2

D

√3

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​সমাধান: 

​দেওয়া আছে,

​sinθ = √3/2

​⇒ sinθ = sin60°

​∴ θ = 60°

​এখন cot60° = 1/√3

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Updated: 1 day ago

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নিচের কোনটি সঠিক? 

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A

cot( - θ) = cotθ

B

cos(- θ) = - cosθ

C

sin(- θ) = sinθ

D

cosec(- θ) = - cosecθ

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tan2A = 1/3 হয়, তবে cos⁡4A + sin⁡4A = ?

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8

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