Sunday, October 18, 2009

Reflection #9

This week we started to learn trig. I'm actually pretty excited to learn trig b/c of in geometry last year we learned SOHCAHTOA and it helped me alot. So i'm expecting the trig we learn this year to come in handy.

I'm gonna explain how to convert back and forth between rads and degrees.
1.)Rads==>Degrees
To do this I am going to multiply the radian by 180/pi.
Ex. Convert 3pi/4 to degrees.
  • 3pi/4 x 180/pi
  • 540pi/4pi
  • 135degrees

2.)Degrees==>Rads

To do this I will simply multiply by pi/180.

Ex. Convert 135 degrees to radians.

  • 135 x pi/180
  • 135pi/180
  • 3pi/4

And thats how you do that.

The only hard thing about trig so far is that i will have to memorize those formulas, but thats nothing really that i need help with i just need to study. Hope i helped.

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1 comment:

  1. alainaOctober 22, 2009 at 12:15 AM

    so pretty much, the formulas for
    SIN, COS, and TAN you can remember from
    SOHCAHTOA. S=sin; C=cos; T=tan; O=opposite; A=adjacent; H=hypotenuse
    and for CSC, SEC, and COT, they are the opposite(the denom. would become numerator and numerator would become the denom.)
    SIN->CSC
    COS->SEC
    TAN->COT

    ReplyDelete

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