Hello , Good Morning !

I have couples of Exercices where i struggled to solve them

solve the inequaliti and show the solution sets on the real Line

1. x-3 / 2 >= -4+x / 3

My resolution is x-1 /6 >= 0

x-1>= 0 --> x>=1 / Thats All ?

2.

I don't know what to do with the absolute value and solve this

3.write the Equation through (-1 ,2) and perpendicular to 1/2 x + 1/3 y = 1

My solution is y = -2x right ?

4. cos(-x) = -cosx ? or cos x?

5.y = -2+radical (1-x) i need to find the domain and range

for me domain is ]- infinity ,1] how to find the Range ?? do i need to skatch it ?

6.y= ln (x-3) +1 how to find the domain and Range ?

7.prove : 1-cos x / sin x = sin x / 1+cosx

b- 1-cosx / 1+cos x = tan^2 (x/2)

tks my friends help me , i did 70% of the homework and 30% i didn't know how so i need ur help to complete