lesson 1
Completion requirements
Standard Trigonometric Values
🔹 What are Standard Trigonometric Values?
Standard trigonometric values are the values of sin, cos, and tan for some fixed angles.
These angles are commonly used in problems and are easy to remember.
The standard angles are:
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0°
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30°
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45°
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60°
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90°
Knowing these values helps in quick calculations and problem solving.
🔹 Standard Values of Trigonometric Ratios
| Angle | sin | cos | tan |
|---|---|---|---|
| 0° | 0 | 1 | 0 |
| 30° | 1/2 | √3/2 | 1/√3 |
| 45° | 1/√2 | 1/√2 | 1 |
| 60° | √3/2 | 1/2 | √3 |
| 90° | 1 | 0 | Not defined |
👉 These values are derived from special right-angled triangles.
🔹 Why These Values Matter
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They save time during calculations
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They are used in almost every trigonometry problem
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They help check whether answers are reasonable
✅ Lesson 1 Key Takeaway
✔ Standard values are fixed and easy to remember
✔ They are used to solve trigonometric problems
✔ Very important for practice and exams
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