Originally Posted by
masters Originally Posted by MajorJohnson
I'm not sure if i'm doing this problem correctly. :
cot z sin z + tan z cos z
Heres one way i did it:
cotz = (cos / sin) sin z
= cos z
= cot z + (sin/cos) cos z
This is what i'm left with:
= cot z + cos z
Hi MajorJohnson,
I don't see an identity here, but if you just want to simplify....
Sorry that cot z should be a cos z
And the method you did, was the other way i had tried to solve it and got the same answer. I just wasn't sure if it was right or not.
Thanks.
Code:
Here's another one i'm stuck on:
1 - sin^2 / csc^2 - 1 =
Heres what i've gottten so far:
1/csc ^ 2 - sin ^ 2 / 1 =
I've i try converting them using fundamental I.D. they won't cancel out, it'll just be subtracted to equal 0. Would that be the answer then?
Here's another one
sec x * sin x/tan x =
1 / cos x * sin x / sin x /cos x
(sin x / cos x ) (sin x / cos x) =
sin x /cos x ^ 2 * sin x =
answer:
sinx ^ 2 / cos x ^ 2