Inverse Trig Functions of Right Triangles

Choose the correct ratio.

• A

• B

• C

• D

• 6.99
• 6.33
• 13.59
• 7.83

• 57.99
• 51.32
• 38.68
• 32.00

• 9.28
• 2.87
• 2.97
• 8.76

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.

What would you use to solve for a?

• sin

• cos

• tan

• Pythagorean theorem

Find the length of side w.

• 21.4 cm

• 18.0 cm

• 36.5 cm

• 43.6 cm

• 20.35
• 12.72
• 14.99
• 21.83

• 44.55
• 22.69
• 41.66
• 38.49

To find a missing angle when given two sides, you must use ______ 

• Trigonometric Functions 

• Trigonometric Rations 

• Inverse Trigonometric Functions

• Pythagorean Theorem