Skip to main content
Msc
Tutor
🔍
🎤
→
👩🏫
AI Teacher
🇬🇧
EN
▼
Sign In
🔔
📝
Ask AI
☰
🏠 Home
➕ Mathematics ▾
📘 Class 9-10
Number System
Ch 1
Polynomials
Ch 2
Coordinate Geometry
Ch 3
Linear Equations
Ch 4
Triangles
Ch 7
Quadratic Equations
New
Arithmetic Progressions
Ch 5
Trigonometry
Ch 8
Statistics
Ch 14
📗 Class 11-12
Sets & Functions
Ch 1
Complex Numbers
Ch 5
Conic Sections
Ch 11
Limits & Derivatives
Ch 13
Integration
New
Matrices
New
Probability
Ch 15
🏆 Tools
🧮 Calculators
📋 Formula Bank
📝 Math Mock Test
⚗️ Science ▾
🔬 Physics
Motion
Ch 1
Newton's Laws
Ch 9
Gravitation
Ch 10
Work & Energy
Ch 11
Light — Reflection
Ch 10
Electricity
Ch 12
🧪 Chemistry
Matter Around Us
Ch 1
Atoms & Molecules
Ch 3
Periodic Table
Ch 5
Chemical Reactions
Ch 1
Carbon Compounds
Ch 4
🧬 Biology
The Cell
Ch 5
Photosynthesis
Ch 7
Heredity & DNA
Ch 9
Reproduction
Ch 8
📊 Commerce ▾
📒 Accountancy
Basic Accounting
Ch 1
Journal Entries
Ch 3
Ledger Accounts
Ch 4
Trial Balance
Ch 6
Balance Sheet
Ch 9
Partnership Accounts
New
💹 Economics
Demand & Supply
Ch 2
Market Structures
Ch 6
National Income
Ch 2
Money & Banking
Ch 3
GST & Taxation
New
🏢 Business Studies
Nature of Business
Ch 1
Forms of Business
Ch 2
Marketing
Ch 11
Consumer Protection
Ch 12
🎓 Classes ▾
Select Class
1
2
3
4
5
6
7
8
9
10
11
12
🏆 JEE / NEET
New
🎯 Competitive Exams
🎥 Live Classes
New
📝 Mock Test
💰 Pricing
💬 Community
🏫 Schools ▾
🏫 Register School
🔑 School Login
📊 School Dashboard
👨🏫 Teacher Dashboard
Formula
Double Angle
sin2A = 2sinAcosA cos2A = cos²A - sin²A = 1-2sin²A
Back to chapter
Ask AI about this formula
🤖
MscTutor