Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If $\frac{3\sqrt{3}secθ+4 tan θ}{3 tan θ + \sqrt{3} sec θ}=2, 0° < θ < 90°$, then the value of cos θ will be :

Options:

$\frac{\sqrt{3}}{2}$

$\frac{1}{\sqrt{2}}$

$\frac{1}{4}$

$\frac{1}{2}$

Correct Answer:

$\frac{1}{2}$

Explanation:

$\frac{3\sqrt{3}secθ+4 tan θ}{3 tan θ + \sqrt{3} sec θ}=2, 0° < θ < 90°$

3√3 secθ + 4 tanθ = 6 tanθ + 2√3 secθ

√3 secθ  = 2 tanθ

cosec θ = \(\frac{2}{√3}\)

{ we know, cosec 60º = \(\frac{2}{√3}\) }

Now,

cosθ

= cos 60º

= \(\frac{1}{2}\)