- #1

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cot(-x)cos(-x)+sin(-x)= -csc x

i started out as:

cos(-x)/sin(-x) cos(x)-sin x, then got it to cos^2 x/sin x - sin x. I thinking i am solving this correctly but I can't figure out the next step to get -csc x.

sin^4 x + (2 sin^2 x) (cos^2 x) + cos^4 x = 1

for this one, first, i factored and got:

sin^2 x (sin^2 x + 2) cos^2 x (1 + cos^2 x) =1

I don't know if the factoring helped or did anything, but I can't seem to get anything else to get 1.