Common trig values?

[kittywalker]

Advertisement - Members don't see this ad

Does anyone have a list of the common trig values we should know for the DAT?? The first time I took the test it seemed like a quarter of my questions required me to know crazy trig values.

I would appreciate any help! 🙂

 

[Ryltar]

Here's a list of most of the crazy trig formulas that you need to know. Just ignore the Sin(3a), Cos(3a), and Sin(a/2) on the list.

http://www.flashcardexchange.com/flashcards/list/534954

 

[Ryltar]

Just caught an error on that link.


Tan(a-b)= ?
tan(a)+tan(b)/1+tan(a)•tan(b)


and not


Tan(a-b)= ?
tan(a)+tan(b)/1-tan(a)•tan(b)

 

[Ryltar]

Here's a helpful thread for QR references:

http://forums.studentdoctor.net/showthread.php?t=583523&highlight=quantitative

 

[Streetwolf]

Just caught an error on that link.


Tan(a-b)= ?
tan(a)+tan(b)/1+tan(a)•tan(b)


and not


Tan(a-b)= ?
tan(a)+tan(b)/1-tan(a)•tan(b)

No the negative sign should be in the numerator and not the denominator.

 

[Ryltar]

Ugh Quick Study Academic bar charts were wrong... lol.

 

[Ryltar]

Sorry for the misinformation there.

This link looks accurate for trig formulas.

http://www.mathwords.com/t/trig_identities.htm

 

[fishstalker73]

Do you need to memorize all the geometry and trig formulas for the DAT?

 

[Ryltar]

The trig formulas I plan on knowing for the DAT are: pythagorean identities, sum/difference formulas, double angle formulas, basic identities (sec = 1/cos, etc.), law of sines, and law of cosines.

For geometry, memorize the big 3 dimensional formulas: cylinder, pyramid, sphere, etc.
Also, I heard that circle formula, ellipse formula, and parabola formula may be on there.

So, don't memorize everything, but rather the commonly tested ones.

 

[Ryltar]

Also, know the unit circle forwards and backwards.