January 11, 2017
Precalc Warm Up # 4-1
Using the sine, cosine and tangent buttons on your
calculator, calculate the value of x to the nearest 100th.
January 11, 2017
Reviewing Right-Angled Trig
hypoteneuse
leg
leg
January 11, 2017
Similar Triangles...
Same trig ratios
January 11, 2017
soh•cah•toa
January 11, 2017
January 11, 2017
January 11, 2017
Find the side length a.
January 11, 2017
Find angle B.
January 11, 2017
It will be critical that you know from memory 30°60°90° and
45°45°90° exact ratios.
12 + 12 =
tan A =
1
1
1
tan
=
1
-1
right isosceles
isosceles
right
A 45°45°90° triangle is called an __________
triangle.
January 11, 2017
45° • 45° • 90° Triangles
January 11, 2017
From Pythagoras...
22 - 12 =
cos B =
1
2
cos-1( 12 ) =
January 11, 2017
30° • 60° • 90°
January 11, 2017
Find the exact value of x.
January 11, 2017
Reviewing Right-Angled Trig
hypoteneuse
leg
leg
January 11, 2017
Similar Triangles...
Same trig ratios
January 11, 2017
soh•cah•toa
January 11, 2017
January 11, 2017
January 11, 2017
Find the side length a.
January 11, 2017
Find angle B.
January 11, 2017
It will be critical that you know from memory 30°60°90° and
45°45°90° exact ratios.
12 + 12 =
tan A =
right isosceles
isosceles
right
A 45°45°90° triangle is called an __________
triangle.
January 11, 2017
45° • 45° • 90° Triangles
January 11, 2017
From Pythagoras...
22 - 12 =
cos B =
1
2
cos-1( 12 ) =
January 11, 2017
30° • 60° • 90°
January 11, 2017
Find the exact value of x.
January 11, 2017
Homework 4-1