Algebra 2 !
what is the value of cosθ, given that sinθ=−710 and cosθ> 0? simplify radicals and rationalize the denominator, if necessary. enter your answer in the box.

The image of abc is a'b'c. what transformations would result in this image? abc is reflected over the line x = 1, then is rotated -90° around the origin. abc is reflected over the line y = x - 1, then t: (x, y) → (x - 1, y - 1). abc is rotated 90° around the origin, then is reflected over the y-axis. abc is rotated -90° around the origin, then is reflected over the line y = -1.