need to know how to convert radians to degrees ? + unit circle ?

[dentalstudent2021]

do we have to know how to convert radians to degrees and vice versa ?

also, should we know the unit circle, atleast the 1st quadrant ?

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[alexis2010]

From what I have seen here yes. It's pretty simple though. To convert from radians to degrees you just change π to 180°. For example π/4 = 180/4 = 45°

 

[dentalstudent2021]

From what I have seen here yes. It's pretty simple though. To convert from radians to degrees you just change π to 180°. For example π/4 = 180/4 = 45°

how about the unit circle ?

 

[byahnoob]

You need to know the unit circle. Its crucial.
If you know the unit circle, you know how to convert from radians to degrees and vice-versa.

 

[nornton]

Bootcamp has a pretty good formula sheet for QR http://datbootcamp.com/quantitative-reasoning-strategy/introductory-qr-formulas-cheat-sheet/

 

[510586]

Doesn't take long to manually do it if you don't wanna memorize all the values. The timing on qr is more like if you can see a prob and know how to do it. I feel like the benefits of shaving a second or 2 by not using calculator or by memorizing all 16 values of the unit circle are marginal at best.

 

[ThunderSplash]

do we have to know how to convert radians to degrees and vice versa ?

also, should we know the unit circle, atleast the 1st quadrant ?

You should definitely google the "Unit circle left hand trick". I learned it in high school and it makes the unit circle trivial. As long as you can recognize when sin, cos and tan are positive or negative.