Topics:
• Applications of trig equations to AC circuits (Handout)
MAT1275SolvingTrigEquationsApplications
We worked in class on the first two examples. Please complete the other two at home and bring them in next time. I will be collecting these (all four exercises). You will get 2 Homework points when you hand them in on Wednesday.
• Solving triangles which are not right triangles: (Sections 7.1 and 7.2 in the Trig book)
The Law of Sines
The Law of Cosines
Notice that in order to use the Law of Sines, you need to know at least one angle and its opposite side. We used it in the ASA situation (Example 1 Section 7.1) and also in Example 2 of Section 7.2 to find an angle.
The Law of Cosines can be used if you know two sides and their included angle (the SAS situation), to find the other side. See Example 2 in Section 7.2.
Next time we will see how to use the Law of Cosines to find an angle in the SSS situation.
Homework:
• Review the two application examples we worked in class and finish examples 3 and 4 on the handout. Bring both pages to class to hand in next time.
• Review the examples we worked in class using the Law of Sines and the Law of Cosines.
• Do the assigned problems from sections 7.1 (all of them) and 7.2 (up to #11 only) in the Course Outline
• Do the WeBWorK: the first part is due by 11 PM Tuesday, start early! The Law of Cosines assignment is not due until later because we have not yet finished discussing its use.
You may also want to take a look at the Math Department’s Final Exam review sheet
Remember that you can use the Piazza discussion board to ask questions if you get stuck on any of the WeBWorK or the other homework problems. Don’t forget to include the problem itself in your question, as that will make it easier for you to get a quick response!
