Answer:

Step-by-step explanation:
Given:
180°<θ<270° and 
We know for any angle
,

∴
Answer:
<h3>

</h3>
Step-by-step explanation:



?
Now, Using Pythagoras theorem

plug the values
⇒
Evaluate the power
⇒
Swap the sides of the equation
⇒
Move constant to right hand side and change it's sign
⇒
Calculate the difference
⇒
Squaring on both sides
⇒
Hope I helped!
Best regards!
I think 6 but I’m not sure also how I got this answer is by simplifying 3/2 to 1 and a half so than I did 7 and a half - 1 and a half
Answer:
https://youtu.be/wOH_gVtidns
I recorded a video of myself explaining it hope it helps ;)
Step-by-step explanation: