Sunday, October 18, 2009

Taylor Reflection #9

This week was kind of stressful for me
ive been spiratically checking edline and with mrs robinson for the exam grades. My advanced math grade is the only one i was worried about. However when we started trig on wednesday i was a little bit scared ill admit to that.. but when we started doing examples i realized that so far things were going smoothly. Section seven one homework was done in less then ten minutes. i realize that trig builds and it has the potential to get rediculously hard but i think im going to be the optimist and live in the now and stick with being happy that so far so good.

I can easily explain the summary of section seven one

Angles are measured in DEGREES (possibly with either minutes' or minutes' andseconds")
and RADIANS


To find minutes
multiply what is behind the decimal by 60
and take whole number as minutes'

To find seconds
multiply what is behind the decimal of minutes by 60
then whats behind that decimal by 3600 to get seconds'

To get radians

degrees x pi/180degrees

((***Remember to always ues exact answers))
((*** Remember to never plug pi into calculator))



We also learned section seven two

I feel like the formulas for section seven two are going to trip me up
if any body has an easy way to remember the formulas that would be greaatly appreciated advice.
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2 comments:

  1. alainaOctober 22, 2009 at 12:11 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

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  2. aliciamarie8592October 22, 2009 at 7:55 PM

    alrighty well if your referring to the formulas for finding radius and central angle and area of a sector and all that basically just remember 2 formulas.

    1. S=R theta
    2. K=1/2 R^2 theta

    whatever the queastion is asking you to find for, plug into one or both of these formulas.

    remember:

    r=radius
    s=arc length
    theta=angle
    k=area of sector

    if they ask for apparent size, they are referring to theta so you would solve for the angle

    if they ask for distance, they are referring to the radius so just solve for radius

    hope it helped!!! :)

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