← All lessons
📈 Optional Mathematics - Class 10
Home
›
Class 10
›
Optional Mathematics
›
Lesson 8: Circle
›
Angle between Two Straight Lines
Lesson 8 · Circle
Angle between Two Straight Lines
Optional Mathematics
Subject
8 min
Estimated read
📖
Note
🔬
Activity
⭐
Points to Remember
✏️
Practice Questions
🧪
Practice Test
🖥️
Presentation
Question 1 of 15
1
Two lines have slopes \( m_1 \) and \( m_2 \). Which expression gives \( \tan\theta \) for the angle \( \theta \) between them?
\( \pm\left(\frac{m_1 + m_2}{1 - m_1m_2}\right) \)
\( \pm\left(\frac{m_1 - m_2}{1 - m_1m_2}\right) \)
\( \pm\left(\frac{m_1 - m_2}{1 + m_1m_2}\right) \)
\( \pm\left(\frac{1 + m_1m_2}{m_1 - m_2}\right) \)