Answer:
x+20 ≤ x²+9
Step-by-step explanation:
the options you gave didnt have any square options, so imma just guess you meant this? if not, let me know.
Subtract the 2 on both sides to get -4x=-5x+7, then add -5 on both sides and get 1x=7 then divide 1 on both side to get x=7
Answer:
Step-by-step explanation:
180-90=90÷2=45
45÷2=22.5
22.5+22.5=45
180-45=135
Angle 0AC=22.5
Angle OCA=22.5
Angle AOC=135
Recall that
sin²(<em>θ</em>) + cos²(<em>θ</em>) = 1
for all <em>θ</em>, and given that cos(<em>θ</em>) < 0, we find that
cos(<em>θ</em>) = -√(1 - sin²(<em>θ</em>)) = -√(1 - (2/5)²) = -√(21)/5
Now,
csc(<em>θ</em>) = 1/sin(<em>θ</em>) = 1/(2/5) = 5/2
and
cot(<em>θ</em>) = cos(<em>θ</em>)/sin(<em>θ</em>) = (-√(21)/5)/(2/5) = -√(21)/2
