5(2x-8)=90
10x-40=90
add 40 to both sides
10x=130
divide 130 by 10
and the answer Is x=13
1) expand csc and cotx identity
(1/sinx)-sinx = (cosx/sinx)*(cosx)
2) get common denominator on the left side
(1-sin^2x)/(sinx)= (cos^2x)/sinx
3) using cos^2x+sin^2x=1 you finished
cos^2(x)/sinx= cos^2(x)/sinx
hope that helps<span />
Answer:
1 and 3
Step-by-step explanation:
option 4 isn’t correct because you can’t combine 5 and 2x. You could if the 5 had an x too
the last one isn’t correct because you aren’t substituting anything
the second isn’t correct because you aren’t combining them all together. You are only combining the ones that are like-terms
So there’s no actual question because you didn’t attach anything
B
Hope this helped I only did like 1 lesson on functions
