যদি cotθ = 1 হয়, তবে sinθ - cos(- θ) = কত?

A

1

B

2

C

0

D

√2

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সমাধান: 

cotθ = 1 

⇒ cotθ = cot45° 

∴ θ = 45° 


এখন, 

sinθ - cos(- θ) 

= sinθ - cosθ 

= sin45° - cos45° 

= (1/√2) - (1/√2)

= 0

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Updated: 1 month ago

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