Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Trigonometry

Question:

cos(θ + x) = \(\frac{3}{5}\), sin(θ + y) = \(\frac{5}{13}\). Find sin(x - y).

Options:

\(\frac{33}{65}\)

\(\frac{40}{27}\)

\(\frac{34}{67}\)

1

Correct Answer:

\(\frac{33}{65}\)

Explanation:

Using sin(x-y) = sin{(θ+x) - (θ+y)} = sin(θ+x) cos(θ+y) - cos(θ+x) sin(θ+y)

⇒ Here, cos(θ+x) = \(\frac{3}{5}\), sin(θ+y) = \(\frac{5}{13}\)

Put these values,

⇒ sin(x-y) = \(\frac{4}{5}\) × \(\frac{12}{13}\) - \(\frac{3}{5}\) × \(\frac{5}{13}\) = \(\frac{33}{65}\)