Prove the following identities. (Remember, you may only change one side of the equation)

(a) Sec θ (1 - sin^2 θ) = cos θ (b) 1 = 1 + sin x/ sin x - csc x

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.

Light travels at 186,000 miles per second. light takes about 1 1? 3 seconds to travel from the earth to the moon. calculate the distance between the earth and the moon based on the speed of light.