Inverse Trig Functions with Reference Triangles

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)

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

• x = tan^–1(24/7)

• x = tan^–1(7/24)

• x = tan^–1(25/7)

• x = tan^–1(7/25)

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

• x =cos^–1(68/85)

• x = cos^–1(85/68)

• x = cos^–1(51/85)

• x = cos^–1(85/51)

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

• x = sin^–1(56/70)

• x = sin^–1(70/56)

• x = sin^–1(70/42)

• x = sin^–1(42/70)

Which equation could be used to solve for the unknown angle?

• x =sin^–1(25/24)

• x = sin^–1(24/25)

• x = sin^–1(25/7)

• x = sin^–1(7/25)

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

Choose the correct ratio.

• sin^-1(9/20)

• cos^-1(9/20)

• tan^-1(9/20)

• cos^-1(20/9)

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

Which expression is correct for "y"?

• y = tan^–1(31/23)

• y = sin^–1(31/23)

• y = cos^–1(31/23)

Which equation is true?

• sin (x) = 11/27

• sin (x) = 27/11

• cos (x) = 11/27

• tan (x) = 11/27