Tuesday/Wednesday
Warm up was to find the perimeter of a right triangle given one side length and an angle measure. Looked at this a few different ways. Worked through two applying Pythagorean theorem problems in real world contexts. Started looking at the basis of inverse trigonometry by recognizing how the calculator works to find sine/cosine/tangent values in the context of tables (and by analogy, how a menu can be inverted in the same way a function can, where inputs and outputs switch). More on this topic Thurs/Fri. Took first trig assessment at end of class.
Notes from board
Homework
no new hw; next assessment announced for 2/22 or 2/23
Resources
finding perimeter given 1 side length and an angle measure: link
Thursday/Friday
Passed back assessments from Tues/Wed, went over a few tricky ones including the relationship effect on area when a figure is dilated. Reviewed discussion from last class on inverse trigonometry and worked through 2 examples to find side lengths, then did 6 additional problems for independent practice. Then did a 3-act math task applying trigonometry to a problem related to a sailboat fitting underneath a bridge. Some classes then played Kahoot to practice inverse trig as well as advanced trig questions.
Notes from board
Homework
get as far as you can with the trig stack (blank copy)
USE 3 DECIMAL PLACES FOR ALL TRIG RATIOS + SIDE LENGTHS
start from the bottom, work your way up strategically
easy online calculator with trig/inverse trig in degrees: link
Resources
understanding inverse trigonometry: link