Trig Practice

Extra Trig Practice

May 26, 2022

The first few slides are just some notes for you to review, review them and use them as much as you want/need. If you want to open them on a separate screen or write them down to use you totally can. Or I can get you printed versions later in the week. :)

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Hope this helps! If not, we'll figure something else out.

Thanks so much for asking for this! I really appreciate your dedication to getting this material done in a way that makes sense to you. I'm sorry this wasn't done for you sooner. ​

The Ratios

Remember: "ratio" is just the high school word for fraction

"opposite" refers to side BC because it is across from angle A (which is the only angle marked, so it's the one we care about)

And hypotenuse is always being pointed to by the square in the right angle

The adjacent side always helps create the right angle.

The hypotenuse is always being point to by the square in the right angle

You only use the sides that make the right angle 

Opposite is furtherest away from the angle, adjacent touches the angle 

Now we have names

each ratio has a special name

sine

cosine

tangent

Sine is o/h

Cosine is a/h

Tangent is o/a

Multiple Choice

• $$\frac{28}{35}=\frac{4}{5}$$  

• $$\frac{21}{35}=\frac{3}{5}$$  

• $$\frac{21}{28}=\frac{3}{4}$$  

• $$\frac{28}{21}=\frac{4}{3}$$  

Multiple Choice

• $$\frac{16}{34}=\frac{8}{17}$$  

• $$\frac{34}{16}=\frac{17}{8}$$  

• $$\frac{30}{34}=\frac{15}{17}$$  

• $$\frac{30}{16}=\frac{15}{8}$$  

Multiple Choice

• $$\frac{32}{24}=\frac{4}{3}$$  

• $$\frac{40}{32}=\frac{5}{4}$$  

• $$\frac{32}{40}=\frac{4}{5}$$  

• $$\frac{24}{40}=\frac{3}{5}$$  

Multiple Choice

You're sitting on a ledge 300 feet away from a building. You have to look up 60 degrees to see the top of the building and down 15 degrees to see the bottom of the building.

Which is the correct set up for solving for the height of the building?

• There's no solution

Multiple Choice

The tallest building in the world is the Burj Khalifa in Dubai (as of April 2019). If you're standing on the bridge 250 meters from the bottom of the building, you have to look up at a 73 degree angle to see the top. How tall is the building?

• 239.1 meters

• 73.1 meters

• 817.7 meters