Which sum or difference identity could be used to prove that cos(270º - thata) = -sin thata is an identity?
cos 270° cos 8 – sin 270° sin e
cos 270° cos 0 + sin 270° sin e
O sin 270° cos
***
cos 270° sin e
O sin 270° cos 0 + cos 270° sin 0

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6

the rocket cannot penetrate the ground, in a contextual sense, therefore the roots of this equation should be the domain of this function. i'll let you find the roots of this quadratic equation (hint: use the quadratic formula:  

1- c

2-a

step-by-step explanation:

mark brainliest!

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8