Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

If sin260° + cos245° + cot245° + tan260° - x = 4 , find the value of x .

Options:

 \(\frac{1}{2}\)

 \(\frac{1}{4}\)

 \(\frac{4}{5}\)

 \(\frac{5}{4}\)

Correct Answer:

 \(\frac{5}{4}\)

Explanation:

⇒ sin260° + cos245° + cot245° + tan260° - x = 4

⇒ (\(\frac{√3}{2}\))2 + (\(\frac{1}{√2}\))2 + 1 + (\(\sqrt {3}\))2 - x = 4

⇒ \(\frac{3}{4}\) + \(\frac{1}{2}\) + 1 + 3 - x = 4

⇒ \(\frac{3 + 2 + 4 + 12 - 4x}{4}\) = 4

⇒ 21 - 4x = 16

`4x = 5 

⇒ x = \(\frac{5}{4}\)