Geo Un6Wk3 - Trig Basics

​Review How to Find and Use
Basic Trig Ratios

Multiple Choice

What does "trigonometry" mean?

• The calculation of angles
• The analysis of polygons
• The study of circles
• 'the measure of triangles'.

• none of these

Multiple Choice

Which is the correct ratio for the sine ratio?

• $$\frac{adjacent\ }{hypotenuse}$$

• $$\frac{opposite\ }{hypotenuse}$$

• $$\frac{adjacent\ }{opposite\ }$$

• $$\frac{opposite\ }{adjacent\ }$$

• none of these

Multiple Choice

Which is the correct ratio for the cosine ratio?

• $$\frac{adjacent\ }{hypotenuse}$$

• $$\frac{opposite\ }{hypotenuse}$$

• $$\frac{adjacent\ }{opposite\ }$$

• $$\frac{opposite\ }{adjacent\ }$$

• none of these

Multiple Choice

Which is the correct ratio for the tangent ratio?

• $$\frac{adjacent\ }{hypotenuse}$$

• $$\frac{opposite\ }{hypotenuse}$$

• $$\frac{adjacent\ }{opposite\ }$$

• $$\frac{opposite\ }{adjacent\ }$$

• none of these

Multiple Choice

What side is opposite $$\angle\alpha$$ ?  

• 17

• 8

• 15

• none

Multiple Choice

What side is adjacent $$\angle\alpha$$ ?  

• 17

• 8

• 15

• none

Multiple Choice

What side is the hypotenuse to $$\angle\alpha$$ ?  

• 17

• 8

• 15

• none

Multiple Choice

What is a common way to remember the definitions of the trig ratios?

• SAH COH TOA

• SOA COH TOA

• SOH CAH TOA

• ADJ OPP HYP

Multiple Choice

What is  $$\cos A$$  ?

• $$\frac{29}{20}$$  

• $$\frac{21}{29}$$  

• $$\frac{20}{29}$$  

• $$\frac{21}{20}$$  

• none of these

Multiple Choice

What is  $$\tan A$$  ?

• $$\frac{29}{20}$$  

• $$\frac{21}{29}$$  

• $$\frac{20}{29}$$  

• $$\frac{21}{20}$$  

• none of these

Multiple Choice

What is  $$\tan\ C$$  ?

• $$\frac{20}{21}$$  

• $$\frac{21}{29}$$  

• $$\frac{20}{29}$$  

• $$\frac{21}{20}$$  

• none of these

Multiple Choice

If you are given two sides of a right triangle and of of them is NOT the hypotenuse, which trig function should you use?

• sine

• cosine

• tangent

• none of these

• all of these

Multiple Choice

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

• sine

• cosine

• tangent

• none of these

• all of these

Have a calculator or Desmos ready

Multiple Choice

Find Cos(A) as a decimal rounded the the nearest ten-thousandth.

• .4706
• 1.875
• .8824
• .5333
• none of these

Multiple Choice

Choose the correct ratio. In other words, which equation is correct?

• sinZ=5/13

• sinX=5/13

• cosX=13/12

• tanZ=12/5

Multiple Choice

If you are given 2 of the sides to an obtuse triangle, which trig function should you use to find the other side?

• sine

• cosine

• tangent

• You can only use trig functions on right triangles.

Multiple Choice

Solve for x. Round to the nearest tenth.

• 9.8
• 0.1
• 0.038
• 9.9

Multiple Choice

Solve for x. Round to the nearest tenth.

• 103.5
• 4.7
• 55.0
• 23.4

Multiple Choice

Choose the correct ratio.

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

Multiple Choice

Find x round to the nearest tenth.

• 46.1
• 4.9
• 16.4
• 26.9
• none of these

Poll

After this review, I feel --- about using basic trig ratios

• very good/ very confident

• good/confident

• eh, so-so

• lost! I don't get any of this trig stuff

• other: my thoughts/ feelings are not listed here