Substract. What is the difference (9 x 10^10) - (4 x 10^10) in scientific notation?

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

What is 1/2 x (6 x 4)+3 + 2 show your work

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.