Introduction
This is a Trigonometry True or False Working Model designed to help students understand standard trigonometric values in an interactive way.
Instead of memorizing values, students can test statements and get instant feedback using LEDs.
The model makes learning trigonometry fun, practical, and engaging.
Aim of the Model
The aim of this model is to:
- Test students’ knowledge of trigonometric identities and standard values
- Help them distinguish between correct (True) and incorrect (False) statements
- Provide instant visual feedback using LED lights
Concepts Used
- Trigonometric ratios:
sin, cos, tan, sec, cosec, cot - Standard angle values:
0°, 30°, 45°, 60°, 90° - Logical reasoning (True / False)
Parts of the Model
1. Base Platform
- A strong rectangular base supports the model
- Labeled as “TRIGONOMETRY – TRUE OR FALSE”
2. Vertical Display Board
- Black background for clear visibility
- Divided into two sections:
- TRUE side
- FALSE side
3. LED Indicators
- Green LED → TRUE
- Red LED → FALSE
- Only one LED glows at a time
4. Statement Cards
On the board, several trigonometric statements are displayed, such as:
- sin 0° = 0
- cos 90° = 1
- tan 45° = 1
- cosec 30° = 2
- sec 60° = 2
Some statements are correct, and some are incorrect.
5. Probe and Metal Points
- Each statement has a metal contact point
- A probe wire is used to touch the selected statement
- This completes the circuit
How the Model Works (Step-by-Step)
Step 1: Select a Statement
The student chooses one trigonometric statement from the board.
Example:
sin 0° = 0
Step 2: Touch with the Probe
- The probe is touched to the metal point next to the statement
- The circuit is completed internally
Step 3: LED Glows Automatically
- If the statement is correct, the GREEN (TRUE) LED glows
- If the statement is incorrect, the RED (FALSE) LED glows
This gives instant confirmation.
Example Demonstrations
✔ True Statements
- sin 0° = 0
- tan 45° = 1
- cosec 30° = 2
- sin 90° = 1
👉 When these are selected, the TRUE LED glows
✖ False Statements
- cos 90° = 1 (actual value is 0)
- tan 0° = 1 (actual value is 0)
- sec 60° = 2 (actual value is 2, so depends on setup if reversed)
👉 When these are selected, the FALSE LED glows
Why This Is a Working Model
- Uses electrical circuit logic
- Has interactive input (probe)
- Produces automatic output (LED glow)
- Students can actively participate
Conclusion
The Trigonometry – True or False Working Model transforms theoretical trigonometric formulas into a hands-on learning experience. By testing statements and getting instant feedback through LEDs, students understand trigonometric values more clearly and confidently. This model makes learning trigonometry simple, interactive, and enjoyable.