Which identity is not used in the proof of the identity 1+cot^2 theta =csc^2 theta

*urgent*
*picture provided*

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.

Solve x+3y=6 and 4x-6y=6 by elimination . show work !