# How to Find Trigonometric Ratios Based on Reference Angle

**Hi ! I hope you are watching continuously the videos series of trigonometry.**

**Now you are perfect in trigonometric fundamental concept please learn & remember those tricks & short sentences. **

**Now in this videos we are going to learn – how to find the trigonometric ratios based on the reference angle taken.**

**First think this concept is really simple and now watch this video taking you notebook and pen !**

**In this problem the main thing is how you observe the right angle triangle and determining the Perpendicular & Base Side. First see the**

** reference angle in the question which angle it is then use the as we already discussed trick-**

**1st – Luther Had Some Books Of Personality.
**

**L – H – Largest/Longest side Hypotenuse**

**S-B – Seat of angle Base**

**O- P – Opposite of angle Perpendicular**

**And then see which trigonometric ratios you have to find out using 2nd trick – Some People Have Curly Black Hair They Perform Best. **

Some (Sine) |
Curly (Cos) |
They (Tan) |

People (P) |
Black (B) |
Perform (P) |

Have (H) |
Hair (H) |
Best (B) |

**Here I am listing some problems please solve and if you feel any problem then please comment !**

**If you have finished doing these all then lets watch another video –**

**4. Trigonometry – Finding 5 other Ratios If Given One !**

**5. Solving Trigonometric Expression From Given Relation**

**6. Solving Trigonometric Expression Using Pythagoras Theorem **

**7. Trigonometric Ratios Verifying Problems**

**8. Trigonometric Ratios of 45 Degree**

**9. Trigonometric Ratios of 30 Degree**

**10. Trigonometric Ratios of 60 Degree**

**11. Trigonometric Ratios of 0 Degree**

**12. Trigonometric Ratios of 90 Degree**

**13. Trigonometry Tables – How to Remember and Write Them If You Know One !**

**14. Trigonometric Ratios – Solving Trigonometric Expression Using Trigonometry Table -Model 1**

**15. Trigonometric Ratios – Solving Problems Using Trigonometry Table – Model 2**

**16. Trigonometric Ratios- Solving Trigonometric Expression -Angle Related Problems- Model 3**

**17. Trigonometric Ratios -Finding the Value of Angle – Angle Related Problems – Model 4**

**18. Trigonometric Ratios -Finding the Value of Angle from Given Relation-Model 5**

**19. Trigonometric Ratios- Finding the Angle & Value of Trigonometric Expression-Model 6**

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