## Preparation with RD Sharma Class 11 Solutions

## FAQs on RD Sharma Class 11 Solutions Chapter 5 - Trigonometric Functions (Ex 5.2) Exercise 5.2 - Free PDF

**1. What are the topics covered in RD Sharma Class 11th Chapter 5 of Trigonometric Function? **

The topics covered in RD Sharma Solutions for Class 11 Maths Chapter 5 are

Trigonometric functions of a real number.

Values of trigonometric functions.

Trigonometric identities.

Trigonometric functions.

Difference in values of trigonometric functions in different quadrants.

Values of trigonometric functions at angles.

Periodic functions.

Even and odd functions

Once the students understand these, it becomes very easy for them to apply in practical life. Questions based on trigonometry help increase student’s thinking abilities and it helps them in the future because it is going to be used in a lot of places. They will need to remember these functions to solve more complex problems.

**2. What are the basic trigonometric formulas and their reciprocal identities? **

Formulas for Angle θ | Reciprocal Identities |

sin θ = Opposite Side / Hypotenuse | sin θ = 1/ cosec θ |

cos θ = Adjacent Side / Hypotenuse | cos θ = 1/ sec θ |

tan θ = Opposite Side / Adjacent | tan θ = 1/ cot θ |

cot θ = Adjacent Side / Opposite | cot θ = 1/ tan θ |

sec θ = Hypotenuse / Adjacent Side | sec θ = 1/ cos θ |

cosec θ = Hypotenuse / Opposite | cosec θ = 1/ sin θ |

**3. What are the ratios of all the basic Trigonometric functions and their reciprocals? **

Trigonometric Ratios/ Angle= θ in Degrees | 0 ° | 30 ° | 45 ° | 60 ° | 90° |

Sin θ | 0 | 1/2 | 1/√2 | √3/2 | 1 |

Cos θ | 1 | √3/2 | 1/√2 | 1/2 | 0 |

Tan θ | 0 | 1/√3 | 1 | √3 | ∞ |

Cosec θ | ∞ | 2 | √2 | 2/√3 | 1 |

Sec θ | 1 | 2/√3 | √2 | 2 | ∞ |

Cot θ | ∞ | √3 | 1 | 1/√3 | 0 |