Inverse Trig Right Triangles

Find the measure of the indicated angle (?) round to the nearest tenth.

• 9.4

• 55.2

• 20.15

• 19.4

We can use SOH-CAH-TOA for...

• Any triangle ever

• Non-right triangles only

• Right Triangles only

• Never

Solve for the missing angle

• 50

• 0.053

• 36.9

• 95

Solve for the missing angle

• 50.2

• 93.1

• 12.6

• 42.2

Match the following definitions with the correct word

• Arctangent

• The ----------- of a positive number is the acute

  angle whose tangent is that number.

• Arccosine

• The ---------- of a number between 0 and 1 is the

  acute angle whose cosine is that number.

• Arcsine

• The --------- of a number between 0 and 1 is the

  acute angle whose sine is that number.

Find A, B, and C.

angle A = ​ ​ (a)  

angle B = ​ (b)  

angle C = (c)  

• 28.3

• 90

• 61.69

• 32.84

• 57.16

• 37.17

• 52.83

• 60

• 30

1. Right triangle ABC is shown. 

Select all expressions which are equal to the length of side BC .

Right triangle ABC is shown. Select all expressions which are equal to the length of side BC.

Use the triangle to find the ratio of cotO

Set up the problem...

• sin X = 41/28

• tan X = 41/28

• cos X = 28/41

• sin X = 28/41