trigo ratios

Views:
 
Category: Entertainment
     
 

Presentation Description

No description available.

Comments

Presentation Transcript

Slide 1: 

GROUP 5

Slide 2: 

Group 5 Members

Slide 4: 

PROJECT TITLE Trigonometric Ratios

Slide 5: 

Target Audience F.2 Students

Slide 6: 

How Slides are going to be used ? The Slide are going to be used during lesson

Slide 7: 

System Requirement A computer with the following software installed Power Point 97/2000

Trigonometric Ratios : 

Trigonometric Ratios Contents Introduction to Trigonometric Ratios Unit Circle Adjacent , opposite side and hypotenuse of a right angle triangle. Three types trigonometric ratios Conclusion

Slide 9: 

Trigonometry (三角幾何) means “Triangle” and “Measurement” Introduction Trigonometric Ratios In F.2 we concentrated on right angle triangles.

Unit Circle : 

Unit Circle A Unit Circle Is a Circle With Radius Equals to 1 Unit.(We Always Choose Origin As Its centre)

Adjacent , Opposite Side and Hypotenuse of a Right Angle Triangle. : 

Adjacent , Opposite Side and Hypotenuse of a Right Angle Triangle.

Slide 12: 

Adjacent side Opposite side hypotenuse

Slide 13: 

hypotenuse Adjacent side Opposite side

Three Types Trigonometric Ratios : 

There are 3 kinds of trigonometric ratios we will learn. sine ratio cosine ratio tangent ratio Three Types Trigonometric Ratios

Sine Ratios : 

Sine Ratios Definition of Sine Ratio. Application of Sine Ratio.

Slide 16: 

Definition of Sine Ratio. 1 If the hypotenuse equals to 1 Sin =

Slide 17: 

Definition of Sine Ratio. For any right-angled triangle Sin =

Slide 18: 

Exercise 1 In the figure, find sin  Sin = Opposite Side hypotenuses = 4 7  = 34.85 (corr to 2 d.p.)

Slide 19: 

Exercise 2 11 In the figure, find y Sin35 = Opposite Side hypotenuses y 11 y = 6.31 (corr to 2.d.p.) 35° y Sin35 = y = 11 sin35

Cosine Ratios : 

Cosine Ratios Definition of Cosine. Relation of Cosine to the sides of right angle triangle.

Slide 21: 

Definition of Cosine Ratio. 1 If the hypotenuse equals to 1 Cos =

Slide 22: 

Definition of Cosine Ratio. For any right-angled triangle Cos =

Slide 23: 

Exercise 3  3 8 In the figure, find cos  cos = adjacent Side hypotenuses = 3 8  = 67.98 (corr to 2 d.p.)

Slide 24: 

Exercise 4 6 In the figure, find x Cos 42 = Adjacent Side hypotenuses 6 x x = 8.07 (corr to 2.d.p.) 42° x Cos 42 = x = 6 Cos 42

Tangent Ratios : 

Tangent Ratios Definition of Tangent. Relation of Tangent to the sides of right angle triangle.

Slide 26: 

Definition of Tangent Ratio. For any right-angled triangle tan =

Slide 27: 

Exercise 5  3 5 In the figure, find tan  tan = adjacent Side Opposite side = 3 5  = 78.69 (corr to 2 d.p.)

Slide 28: 

Exercise 6 z 5 In the figure, find z tan 22 = adjacent Side Opposite side 5 z z = 12.38 (corr to 2 d.p.) 22 tan 22 = 5 tan 22 z =

Conclusion : 

Conclusion Make Sure that the triangle is right-angled

Slide 30: 

END

authorStream Live Help