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12218 (4.3 Right triangle trig).notebook January 23, 2018
Test is block day Jan. 31st or Feb. 1st
you only qualify for a retake if you have at least 75% in the homework category before the test date.
You still get 7 10 points on homework that is turned in late, a grade penalty only kicks in if you are not getting signatures for late assignments, or if you are constantly late.
assignments turned in after Tuesday Jan 30th will get at most 6 points.
You can not retake a test until after all assignments have been turned in.It is easier on everybody if you get help before the test and avoid a retake completely.
12218 (4.3 Right triangle trig).notebook January 23, 2018
12218 (4.3 Right triangle trig).notebook January 23, 2018
Remember soh cah toa
θ
opposite
adjacent
hypotenuse
12218 (4.3 Right triangle trig).notebook January 23, 2018
soh cah toa
sinθ= hypopp
cosθ=adjhyp tanθ=opp
adj
What are the reciprocals of sine, cosine and tangent?
cscθ= hypopp secθ= adj
hypcotθ= opp
adj
12218 (4.3 Right triangle trig).notebook January 23, 2018
4
3Find exact values
sinθ=
cosθ=
tanθ= cotθ=
secθ=
cscθ=
θ
12218 (4.3 Right triangle trig).notebook January 23, 2018
Sketch triangle and find the other trig. functions
1. cosθ= 37
sinθ=
cosθ=
tanθ= cotθ=
secθ=
cscθ=
12218 (4.3 Right triangle trig).notebook January 23, 2018
2. cotθ= 5 sinθ=
cosθ=
tanθ= cotθ=
secθ=
cscθ=
Sketch triangle and find the other trig. functions
12218 (4.3 Right triangle trig).notebook January 23, 2018
hint for 26: sin = 1/csc or csc = 1/sinfind an angel between 0o and 90o whose sin = hint #2
12218 (4.3 Right triangle trig).notebook January 23, 2018
Find the exact values of the indicated variables.
x
y15
300 600
r
x
38
no calculators.
hypotshort leg
long leg
given hypotenuse, divide by 2 for short leg. given short leg, multiply by 2 for hypotenuse
given short leg, multiply by root 3 for long leg.given long leg, divide by root 3 for short leg.
For All 306090 triangles:
12218 (4.3 Right triangle trig).notebook January 23, 2018
The angle you are given is the angle of elevation, which represents the angle from the horizontal upward to the object.
12218 (4.3 Right triangle trig).notebook January 23, 2018
A 25 meter line is used to tether a helium filled balloon. Because of a breeze the line makes an angle of approximately 75 degrees with the ground.Draw a right triangle for this situation.
Find all the unknown quantities.How high of the ground is the balloon?
12218 (4.3 Right triangle trig).notebook January 23, 2018
Test is block day Jan. 31st or Feb. 1st
you only qualify for a retake if you have at least 75% in the homework category before the test date.
You still get 7 10 points on homework that is turned in late, a grade penalty only kicks in if you are not getting signatures for late assignments, or if you are constantly late.
assignments turned in after Tuesday Jan 30th will get at most 6 points.
You can not retake a test until after all assignments have been turned in.
It is easier on everybody if you get help before the test and avoid a retake completely.
page 280 ( 135 odd and 81 skip #33) Must show steps, draw and label the triangle, show the Pythagorean theorem . . .
12218 (4.3 Right triangle trig).notebook January 23, 2018