Solve Right Triangles Using Inverse Trig Functions

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

• Trigonometric Functions 

• Trigonometric Rations 

• Inverse Trigonometric Functions

• Pythagorean Theorem

Use inverse trig ratios (SOH CAH TOA) to solve for the missing angle

• 49°

• 57°

• 45°

• 54°

What is the length of side x?

• 6.57 cm

• 7 cm

• 7.44 cm

• 26.33 cm

What type of triangles do you use the trig ratios with?

• any type

• right triangle

• obtuse triangle

• acute triangle

Which equation would you use to solve for the unknown angle?

• x = sin^–1(4/5)

• x = cos^–1(4/5)

• x = cos^–1(5/4)

• x = tan^–1(4/5)

What would you use to solve for the missing angle?

• Regular Trig

• Inverse Trig

• Pythagorean Theorem

• All angles in a triangle add up to 180

• Special Right Triangles

Which inverse trig function would you use to find the measure of Angle A?

• inverse sine

• inverse cosine

• inverse tangent

• It is not possible to determine m<A

Choose the correct ratio.

• sin^-1(9/20)

• cos^-1(9/20)

• tan^-1(9/20)

• cos^-1(20/9)

Which expression is correct for "y"?

• y = tan^–1(31/23)

• y = sin^–1(31/23)

• y = cos^–1(31/23)

To solve for the missing angle, what trig equation do we set up?