Trig Ratios

Find @@\sin\ \theta@@

• @@\frac{8}{17}@@

• @@\frac{3}{4}@@

• @@\frac{5}{12}@@

• @@\frac{1}{2}@@

What does soh cah toa stand for?

• A mnemonic device for remembering the ratio patterns in trigonometry.

• A formula for calculating the area of a triangle.

• A method for solving quadratic equations.

• A technique for memorizing the unit circle.

Find @@\cos\ A@@. Don't forget to reduce your fraction.

• @@\frac{1}{2}@@

• @@\frac{3}{5}@@

• @@\frac{4}{5}@@

• @@\frac{5}{6}@@

Find sinA.

• @@rac{3}{10}@@

• @@rac{4}{15}@@

• @@rac{5}{13}@@

• @@rac{2}{5}@@

Which of these statements is correct?

• sinA=cosA

• sinA=cosB

• sinA=cosC

• sinA=sinB

What is the definition of sine in a right triangle?

• Sine is the ratio of the length of the opposite side to the length of the hypotenuse.

• Sine is the ratio of the length of the adjacent side to the length of the hypotenuse.

• Sine is the ratio of the length of the opposite side to the length of the adjacent side.

• Sine is the sum of the lengths of all sides of the triangle.

What is the tangent of 22.5^o?

• @@rac{h_2}{112}@@

• @@rac{1}{ an(22.5^ ext{o})}@@

• @@rac{h_2}{100}@@

• @@ an(22.5^ ext{o}) = rac{1}{ an(67.5^ ext{o})}@@

Find tanA.

• @@rac{3}{4}@@

• @@rac{5}{12}@@

• @@rac{4}{5}@@

• @@rac{12}{5}@@

Find sinB.

• @@rac{12}{13}@@

• @@rac{5}{13}@@

• @@rac{3}{5}@@

• @@rac{4}{5}@@

If you know the two legs of a right triangle, which trig function do you use?

• Sine

• Cosine

• Tangent

• Secant