Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

What is value of \(\frac{cosec (68° + θ) - sec(22° - θ) - tan(67° +θ) + cot(23° - θ)}{tan 13° tan 37° tan 45° tan 53° tan 77°}\)

Options:

1

0

2

-1

Correct Answer:

0

Explanation:

\(\frac{cosec (68° + θ) - sec(22° - θ) - tan(67° +θ) + cot(23° - θ)}{tan 13° tan 37° tan 45° tan 53° tan 77°}\)

\(\frac{cosec (68° + θ) - cosec(90 - (22° - θ)) - tan(67° +θ) + tan(90 - (23° - θ))}{tan 13° tan 37° tan 45° cot37° cot13°}\)

\(\frac{cosec (68° + θ) - cosec(68° + θ) - tan(67° +θ) + tan(67° + θ)}{tan 13° tan 37° tan 45° \frac{1 }{tan37° } \frac{1 }{ tan13°} }\) = \(\frac{0 }{ 1}\) = 0

 

cosec (68° + θ) = sec (22° - θ)    [By complementary angle property]

tan (67° + θ) =  cot (23° - θ)   [By complementary angle property]