Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If sin θ + cos θ = $\sqrt{2}$, then find the value of cosec θ + cot ?

Options:

$\sqrt{2} - 1$

$\sqrt{2} + 5$

$\sqrt{3} - 1$

$\sqrt{2} + 1$

Correct Answer:

$\sqrt{2} + 1$

Explanation:

sin θ + cos θ = \(\sqrt { 2}\)

Put θ = 45º

sin  45º + cos  45º = \(\sqrt { 2}\)

\(\frac{1}{√2}\) + \(\frac{1}{√2}\) = \(\sqrt { 2}\)

 \(\frac{2}{√2}\) = \(\sqrt { 2}\)

\(\sqrt { 2}\) = \(\sqrt { 2}\)

LHS = RHS   ( satisfied )

Now,

( cosec θ + cotθ )

= ( cosec 45º + cot 45º )

= \(\sqrt { 2}\) + 1