ত্রিকোণমিতির সূত্র

❖ Sin θ = 1/cosec θ

❖ Cosec θ = 1/sin θ

❖ Cos θ = 1/sec θ

❖ Sec θ = 1/cos θ

❖ Tan θ = 1/cot θ

❖ Cot θ = 1/tan θ

❖ Tan θ = Sin θ/cos θ

❖ Cot θ = cos θ/sin θ

1. sin² θ + cos² θ = 1

2. cos θ = √1- sin² θ

3. sin θ = √1 – cos² θ

4. sec² θ – tan² θ = 1

5. sec² θ = √1+ tan² θ

6. cosec² θ – cot² θ = 1

7. cosec θ = √1 + cot² θ

8. tan θ. cot θ = 1

ত্রিকোণমিতির অনুপাত

1. Sin θ = लম্ব/অতিভূজ

2. Cosec θ = অতিভূজ/লম্ব

3. Cos θ = ভূমি/অতিভূজ

4. sec θ = অতিভূজ/ভূমি

5. tan θ = लম্ব/ভূমি

6. Cot θ = ভূমি/লম্ব