Pg. 407/423 Homework• Memorize all Trig stuff!! Test Thursday!!

Study!!!

• #2 x = 0.72, 5.56• #4 no solution!• #6 x = π/8• #8 x = 0, 3.34, π, 6.08• #10 x = 1.47, 4.81• #12 x = 0.98, 4.12, π/3, 7π/3, 5π/3, 11π/6• #14 x = 0, π/3, π, 5π/3• #21 identity #22 identity #23 identity• #24 identity #25 cos x #26 1

7.4 Trig Identities

Simplify/Verify an Expression• Simplify:

• Verify:

• Verify:

• Verify:

cotcsc

21 sin coscos

secsintan cot

cos 1 sin1 sin cos

Chapter 6, 7.3, 7.6 Test Review

Topics!!• Applications – like the

building stuff!• Finding trig values• Memorization-type stuff• Graphing trigs• Solving trigs• Proving trigs

Applications• An observer on the ground

is one mile from a building 1200 ft. tall. What is the angle of elevation from the observer to the top of the building?

Chapter 6, 7.3, 7.6 Test Review

More Practice:• Solve:

• Prove:

• An angle in standard position rotates through (-2, 3). Find all trig values and Ɵ and Ɵ’ in degrees.

Things to Remember…• Everything is on [0, 2π]

unless otherwise noted!!• Solve:

– 1 variable means find it– 2 variables means graph

• Inequalities need either an interval or shaded region!

cos 0.5 cot 1 0x x

tan cot sec cscx x x x