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146 week 12..notebook April 12, 2017
Agenda
Review Quiz 11
Lecture Double and Half Identities
Lecture Equations
Project
Review Quiz 11
146 week 12..notebook April 12, 2017
146 week 12..notebook April 12, 2017
146 week 12..notebook April 12, 2017
toa=opp/adj
Double Angles Identites
146 week 12..notebook April 12, 2017
sin(2x) = 2(3)/(10)= .6
cos(2x)=(1/10)(9/10)= .8
Q4:
In Q3 because both
tan(2x)=sin(2x)/cos(2x)
= .6/.8 = .75
y1=tanx y2= 3
in degrees
146 week 12..notebook April 12, 2017
146 week 12..notebook April 12, 2017
#7 Quiz 11
146 week 12..notebook April 12, 2017
cosx cospi/3-sinxsinpi/3 + cosxcospi/3 +sinx sinpi/3
.5cosx+.5cosx = cosx
6
=sinacosb+cosasinb
cosa = -4/5
cosB=A/H=3/5
sinB=O/H=4/5
146 week 12..notebook April 12, 2017
Half Angles
146 week 12..notebook April 12, 2017
146 week 12..notebook April 12, 2017
146 week 12..notebook April 12, 2017
Solving Trig Equations
146 week 12..notebook April 12, 2017
sin(3x) = cos(2x)+.1
Due when we get back
146 week 12..notebook April 12, 2017
period=12
146 week 12..notebook April 12, 2017
10.2... 19.57...
y2=32
period: 18
desire value: 32 period: 18
intersection: 10.2... 19.57....
10.2...+18n
19.57...+18n
146 week 12..notebook April 12, 2017
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