যদি A + B = 90º হয় এবং tanA = 1/√3 হয়, তবে B এর মান কত?
Solution
Correct Answer: Option A
tanA = 1/√3
⇒ tan (90º - B) = 1/√3 [A + B = 90º ]
⇒ cot B = 1/√3
= cot 60º[ যেহেতু, tan (90º - θ) = cotθ]
∴ B = 60º
⇒ tan (90º - B) = 1/√3 [A + B = 90º ]
⇒ cot B = 1/√3
= cot 60º[ যেহেতু, tan (90º - θ) = cotθ]
∴ B = 60º
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