Lawrence's cool blog

I will be telling you what i learned in section 8-5

first, you have to check and see if your problem has the same inverse, if it doesn't then you have to use the identities that you learn in section 8-4 to get the same trig function.

Hint: ( YOU CAN'T TRY TO MAKE TANGENT OR COTANGENT BY SINE OVER COSINE OR COSINE OVER SINE)


THINGS YOU CANT DO!!!!!!!!!!!!!!!!!!!!! NEVER IN YOUR LIFE!
1) you can't divide by a trig function when solving to cancel
2) you also can't cancel from inside the trig function 91

example:
2sin(squared) theta-1=0

2sin(squared) theta=1

sin(squared) theta= 1/2

sin theta= +or- square root of 1/2

then you find the degree of all the quadrants.

gotta remember
1) Q2: make negative add 180
2) Q3: add 180
3) Q4: make negative add 360

you take the inverse of sin and you get 45 degrees in Q1
Q2 is 135 degrees
Q3 is 225 degrees
Q4 is 315 degrees
(final answers)

that is all i learned in section 8-5. hope it helps some of you out.