1. EET 109 Math October 5,2015 Week 2 Day 1

2. United States Silver Dollars 1794 – 1803 Up to $2,000 used $50,000 new 1836 – 1839 Up to $1,000 used $5,000 new

3. Carat versus Karat carat: a unit for measuring the weight of jewels (such as diamonds) that is equal to 200 milligrams. karat A unit of weight equal to 200 mg (3.1 grains). Also used as a measure of gold purity (per 24 parts gold alloy).

4. Chapter 1 Fundamental Concepts

5. Home work Week 1 Appendix B4 question 20. Paint needed to paint a house. Should be measured in liters but once applied the answer could be meters squared.

6. Turn in completed home work not partial. Staple your work together and in order.

7. Graded and Recorded 10/10 8/10 Score Scored and recorded.

8. ENGINEERING NOTATION

10. Chapter 1 Fundamental Concepts

11. 1.11 FORMULAS page 40 A formula is an equation, usually expressed in letters, that shows the relationship between quantities. The letter being something we are interested in. $ I got = $ I earned - $ I spent.

12. 1.11 FORMULAS page 42 Solving a formula means to isolate a given letter on one side of the equal sign. We solve formulas using the same principles used solving equations.

13. 1.12 SUBSTITUTION OF DATA INTO FORMULAS Page 45 #1 is saying the same as stated earlier: Solving a formula means to isolate a given letter on one side of the equal sign.

14. 1.12 SUBSTITUTION OF DATA INTO FORMULAS Page 46

15. 1.11 Page 43

16. Ohm’s Law Three units three variations. Multiplication and division.

18. Exercises 1.12 page 48 number 13

20. 75.0 is 2 keystrokes on a calculator that do nothing but create an opportunity to make a data entry error. 75 Ω is just a unit and is not needed for calculations. Hz is just a unit and is not needed for calculations.

21. In class exercise.

22. Chapter 3 Right-Triangle Trigonometry

23. Jump to Chapter 3 Objectives Understand the degree/minute/second and radian measures of an angle. Know the Pythagorean theorem. Know the ratio definitions of the trigonometric functions. Know the values of the trigonometric functions for key angles. Use a calculator to evaluate trigonometric functions. Solve right triangles. You have to know the triangle first.

24. A right triangle has one right angle, two acute angles, a hypotenuse. A right angle is an angle of 90° An acute angle is an angle whose measure is less than 90°.

25. Page 115 How much is the rotation; how large is the angle? Angles can be measured using any of three units of measure: revolutions degreesradians

26. Revolutions RPM

27. Degrees 360 degrees = 1 revolution

28. The one radian is just under 57.3 degrees.

29. Where are the triangle?

30. A, B, C are angles. a, b, c are sides.

31. The Pythagorean theorem gives the relationship among the sides of a right triangle.

32. Pythagorean Theorem page 118

33. Page 119 The 6 trigonometric ratios express the relationship between and acute angle of a right triangle and the length of 2 sides.

34. Page 133 Note: While all six trigonometric rations may be used to solve a right triangle, we will usually choose sine, cosine, and tangent because these buttons appear on calculators.

35. T he S oup is C old o a oh ah Tan = Op/Adj Sin = Op/Hyp Cos = Adj/Hyp

36. SOH CAH TOA Sin = Op/Hyp Cos = Adj/Hyp Tan = Op/Adj

37. The side opposite the angle.

40. For Trigonometry you will need a calculator. All Programs Accessories Calculator

41. View Scientific