Find the exact value of the expression. do not use a calculator. if tan θ = 9, find the exact value of cos (θ).

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points

What rotation was applied to triangle def to create d’e’f’?