Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If sec θ - cosec θ = 0 and θ is an acute angle, then what is the value of $sec^2 θ + cosec^2θ $ ?

Options:

4

1

2

0

Correct Answer:

4

Explanation:

sec θ - cosec θ = 0

Put θ = 45º

sec θ - cosec θ

= sec 45º - cosec 45º

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

= 0

Now, 

sec² θ + cosec² θ

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

= 4