Use the triangle given to find the following trig
ratios.
1.
sin(θ) =
2.
cos(θ) =
3.
tan(θ) =


Test next Thursday
Online HW 10-3 is due Sunday night
 sin(A)
=
 cos(A)
=
 tan(A)
=
DEGREES
First we need to be in _____________
mode. (Always
check before using Trig)
 Go to the scratchpad
 Hit the doc button
 Click 7: Settings and Status
 Click 2: Document Settings
 Find where it says “Angle:”

▼
o Choose Degree from the drop down menu


Click “Make Default”
Select OK
Reference Angle
Second we need to know our ________________(θ).
Find the trig button on your calculator (under ctrl)
 Select the trig function you wish to use
 Input the angle measure into the parentheses
 Hit enter and round your answer to the nearest
hundredth

sin(36) = _______
cos(45) = _______
tan(18) = _______
sin(54) = _______
cos(23) = _______
tan(81) = _______
***Round to the nearest hundredth
1.
reference
Mark the _______________
angle (θ)…usually the one given
but never the right angle!
2.
sides
Label the two given ___________
in relation to θ (opp, adj,
or hyp).
3.
Trig function
Decide which ________________
you can use from
SOHCAHTOA.
4.
variable
Write the equation, using a ______________
for the missing
side.

proportion
Set up a __________________
and solve for the variable
(using cross multiplication)
EX 2: Find x. (This one is a little different!)
1. Mark the reference angle: θ = 75
2. Label the given sides in relation to
θ: adj. and hyp.
3. Decide which trig function to use:
Cosine
4. Write the equation using x for the
missing side
5. Set up a proportion and cross
multiply

Work with a shoulder partner

Cut apart the problem cards

Match each picture and equation with the
corresponding scenarios given below
Pg.
438 #4-9

Continue online assignment