Trigonometry Review

Trigonometry Review

​

Trigonometric Ratios

• sin(A) = opposite / hypotenuse = a / h

• cos(A) = adjacent / hypotenuse = b / h

• tan(A) = opposite / adjacent = a / b

Multiple Choice

Which of the following trigonometric ratios is INCORRECT?

• sin θ = opposite side / hypotenuse

• cos θ = adjacent side / hypotenuse

• tan θ = adjacent side / opposite side

Multiple Choice

Choose the correct ratio.

• sin(37)=x/14
• cos(37)=x/14
• tan(37)=x/14
• sin(37)=14/x

Multiple Choice

Choose the correct ratio.

• cos(33)=x/14
• sin(33)=x/14
• cos(33)=14/x
• sin(33)=14/x

Trigonometry Finding Missing Side-Steps

• Circle Angle

• Label sides that have values

• Decide which trig function to use

• Solve the equation

Multiple Choice

What is the correct ratio?

• sin 40 = w/28
• cos 40 = w/28
• tan 40 = w/28
• sin 40 = 28/w

Multiple Choice

Find the length of side w.

• 21.4 cm

• 18.0 cm

• 36.5 cm

• 43.6 cm

Multiple Choice

What is the correct equation to solve for x ?

• tan (58) = x/11
• tan (58) = 11/x
• cos (58) = x/11
• sin (58) = x/11

Multiple Choice

What is the length of x ?

• 17.6

• 13

• 9.3

• 6.9

The Process is EXACTLY the same

• Highlight the angle

• Based on the angle, identify the given parts as opposite, adjacent and hypotenuse

• Using the parts you know, which trigonometry equation can you use SIne, Cosine, or Tangent

• Write the equation and solve

• Solving for the angle requires you to use the INVERSE Opperation

Finding the Angle in a Right Triangle

Using inverse trigonometry functions to solve for missing angles in a right triangle

Multiple Choice

Solve for the missing angle.

• 32°

• 44°

• 61°

• 50°

Multiple Choice

Find the measure of the missing angle.

• 64^o
• 26^o
• 61^o
• .008^o