Which function is equivalent to y= -cot(x)? a. y= -tan(x) b. y= -tan (x+ pi/2) c. y= tan(x) d. y= tan (x+pi/2)

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Given the median qr and trapezoid mnpo what is the value of x?

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?