Sin(theta)=-4/5 and 3pi/2 less than or equal to theta less than 2pi. find 2(theta)

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Find the power set of each of these sets, where a and b are distinct elements. a) {a} b) {a, b} c) {1, 2, 3, 4} show steps