2. The Right Triangle Nicolaas Lems

3. Contents Sine Cosine Tangent What is a Right Triangle? Title PageReferencesState Core

4. Sine Sine(a)=Opposite/Hypotenuse Opposite Adjacent Hypotenuse a Problem using Sine contents Click Here

5. Cosine Opposite Adjacent Hypotenuse a Cosine(a)=Adjacent/Hypotenuse Problem using Cosine contents Click Here

6. Tangent Opposite Adjacent Hypotenuse a Tangent(a)=Opposite/Adjacent Problem using Tangent contents Click Here

7. What is a Right Triangle? A right triangle is a triangle with one of it’s three angles measuring to be 90º More on the right triangle contents Click Here

8. 10 32° X need help Find the Value of X using the Sine answer contents  previous

9. 12.5 X 70º need help Find the value of X using the Cosine answer contents  previous

10. 20 X 50° need help Find the value of X using the Tangent answer contents  previous

11. Answer 10 32° X Sin(32º)=X/10 X=sin (32º)*10 X=5.3 contents Click to see answer

12. Answer 12.5 X 70º Cos(70º)=12.5/X X= 12.5/Cos(70º) X=36.5 contents Click to see answer

13. Answer 20 X 50° Tan(50º)=20/X X=23.8 X=20/ Tan(50º) contents Click to see answer

14. References Math World http://mathworld.wolfram.com/RightTriangle.html Webmath.com http://www.webmath.com/rtri.html contents

15. State Core Standard 2 Students will represent and analyze mathematical situations and properties using patterns, relations, functions, and algebraic symbols. Objective 2.1 Use patterns, relations, and functions to represent mathematical situations. Identify trigonometric relationships (sine, cosine, and tangent) using right triangles, expressing the relationships as fractions or decimals. contents