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ID#4621 BCS General Math Preli (45)

যদি 1 + tan2θ = 4 এবং θ < 90° হয়, θ = ?
ক) 30°
খ) 45°
গ)
ঘ) 60°

ব্যাখ্যা

$1 + \tan^2\theta = 4$
$\tan^2\theta = 4 - 1$
$\tan^2\theta = 3$
$\tan\theta = \sqrt{3}$

আমরা জানি, $\tan 60^\circ = \sqrt{3}$
$\tan\theta = \tan 60^\circ$
$\theta = 60^\circ$

সঠিক উত্তর: ঘ (60°)
Resource Details
Exam BCS
Subject General Math
Chapter 29
Year 45

Discussion — BCS General Math Preli (45)

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