Defining and understanding trigonometric ratios

If you are given the opposite side and hypotenuse, which trig function should you use?

• sine
• cosine
• tangent

What is the ratio for Tangent?

• $\frac{opp}{hyp}$

• $\frac{adj}{hyp}$

• $\frac{opp}{adj}$

• none of these

Which trig ratio should we use to find the height (y) of the triangle?

• $\sin\left(30^{\circ}\right)=\frac{y}{81}$

• $\cos\left(30^{\circ}\right)=\frac{y}{81}$

• $\tan\left(30^{\circ}\right)=\frac{y}{81}$

What is the tangent ratio?

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• 
• 

Find Tan C

• $\frac{21}{35}=\frac{3}{5}$

• $\frac{28}{21}=\frac{4}{3}$

• $\frac{28}{35}=\frac{4}{5}$

• $\frac{21}{28}=\frac{3}{4}$

Find tan X

• 3/4

• 4/3

• 3/5

• 5/3

Which trig function do you use?

• Sine

• Cosine

• Tangent

Choose the correct ratio.

What is the correct equation that needs to be formed to solve for x?

• sin 40 = w/28

• cos 40 = w/28

• tan 40 = w/28

• sin 40 = 28/w