Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If secθ + cosθ= 2, find the value of $sec^{55}θ+\frac{1}{sec^{55}θ}$.

Options:

2

0

1

55

Correct Answer:

2

Explanation:

secθ + cosθ= 2

cosθ + \(\frac{1}{cosθ }\) = 2

cos2θ+ 1 = 2cosθ 

on solving ,

cosθ = 1

So , θ =  0º

Now , sec55θ + \(\frac{1}{sec55θ }\)

put θ =  0º 

= sec550º + \(\frac{1}{sec550º }\) = 1 + 1 = 2