day 2 simplifying trig expressions
October 27, 2015
Math Analysis AB ­ Unit 3 Day 2 Simplifying Trig Expressions ­ Bag of Tricks
Objectives: Simplify trigonometric expressions 1.) Use obvious identities
2.) Change everything to sin/cosine
3.) Do algebraic operation (factor, distribute, add, divide, etc.)
4.) Deal with fractions ­ split or combine
5.) Multiply by the conjugate of the denominator
6.) Multiply by a fancy form of 1
Thinking Skill: Develop confidence in reason
Warm Up: "Do you know your indentities?" Worksheet
Ex 1: sec2x tan2x + sec2x Ex 2: tan x ­ sec2x tan x
day 2 simplifying trig expressions
October 27, 2015
Ex 3: sec2x ­ 1
sec2x
Ex 4: 5
tan x + sec x
Ex 5: cos2(π/2 ­ x) + cos2(­x)
Try These: sin (­x) + cos2(­x)
csc (­x) sec x sin x + cos (π/2 ­ x)
1 + sec x