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Topic: BASICS OF TRIGNOMETRY Class:10TH Age:15 Medium: English Let’s start module Programmed Instructional material

Programed instructional material: Basics of Trignometry

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Page 1: Programed instructional material: Basics of Trignometry

Topic: BASICS OF TRIGNOMETRYClass:10THAge:15Medium: English

Let’s start module

Programmed Instructional material

Page 2: Programed instructional material: Basics of Trignometry

Objectives

At the end of this module you will be able :

1. To develop Trigonometrical concepts2.To be able to define trigonometrical ratios3.To be able to distinguish between different ratios of trigonometry

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Let’s start module

Page 3: Programed instructional material: Basics of Trignometry

BASICS OF TRIGONOMETRY

Trigonometry is the study of sides and angles of a triangle.In a right angled triangle ABC C

A BWe define ratios of triangle:

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Page 4: Programed instructional material: Basics of Trignometry

TRIGONOMETRIC RATIOS

SIN A =Perpendicular/hypotCOS A=base/hypotenuseTAN A=perpendicular/baseWhere A= AngleCOSEC A=hypotenuse/perpSEC A= hypotenuse/base000COT A=Base/perpendicular

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Page 5: Programed instructional material: Basics of Trignometry

Clearly ,Cosec A= 1/SIN ASEC A= 1/COS ACOT A= 1/TAN A

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Let’s answer some questions

Page 6: Programed instructional material: Basics of Trignometry

Q1:Trigonometry is the study of :

-triangles

-circles

-rhombus

-none of above

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B

C

D

A

Page 7: Programed instructional material: Basics of Trignometry

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Hint!

Page 8: Programed instructional material: Basics of Trignometry

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Hint!

TRI – THREEGON –SIDESMERTRY-MEASURES

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Congratulations you have selected Right Answer!

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Page 10: Programed instructional material: Basics of Trignometry

Q2:There are _____ratios in trigonometry

-4

-3

-6

-2

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B

C

D

A

Page 11: Programed instructional material: Basics of Trignometry

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Hint!

Page 12: Programed instructional material: Basics of Trignometry

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Hint!

For exampleSIN A is a ratio of trigonometry

Page 13: Programed instructional material: Basics of Trignometry

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Page 14: Programed instructional material: Basics of Trignometry

Q3:cot A=Perpendicular/base. This is :

-true

-false

-none

-undefined

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B

C

D

A

Page 15: Programed instructional material: Basics of Trignometry

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Hint!

Page 16: Programed instructional material: Basics of Trignometry

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Hint!

Cot A =1/TAN A

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Page 18: Programed instructional material: Basics of Trignometry

Q4:IN Trigonometry, we work on which triangle

-isosceles triangles

-right angled triangle

-equilateral triangles

-none of these

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B

C

D

A

Page 19: Programed instructional material: Basics of Trignometry

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Hint!

Page 20: Programed instructional material: Basics of Trignometry

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Hint!

Tigonometry is the study of three sides and three angles of a triangle angled at 90 degree

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Page 22: Programed instructional material: Basics of Trignometry

Q5:Trigonometry is the study of :

-angles of triangle

-sides of triangle

-both A & B

-none of above

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B

C

D

A

Page 23: Programed instructional material: Basics of Trignometry

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Hint!

Page 24: Programed instructional material: Basics of Trignometry

Oops! Wrong Answer24

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Hint!

Trigonometry meansTri _threeGon _sidesMetry _ measures

Page 25: Programed instructional material: Basics of Trignometry

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Page 26: Programed instructional material: Basics of Trignometry

Congratulations you have Scored 50 marks!

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