Determine which car gets the better gas mileage

Given (1+cosx)/(sinx) + (sinx)/(1+cosx) =4, find a numerical value of one trigonometric function of x. a. tanx=2 b. sinx=2 c. tanx=1/2 d. sinx=1/2

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

What expression is equivalent to 1/2(2+3x-6)