Call the angles of depression D.
then tan(D)=20/30, or I
arctan(tan(D)) = arctan(⅔)
D=33.690. A is the answer
your calculator probably uses tan^-1 rather than arctan
Answer:
number 1,3,4 and 5
Step-by-step explanation:
i am a mager in this
Answer:
Perpendicular
Step-by-step explanation:
Let's first get the slopes and see if we can go on from that.
(-7,-4 ) and (5,4) have a slope of : 2/3
(-4/6) and (6,-9) have a slope of : -3/2
This means that they are perpendicular because the slope of line #2 is the reverse and reciprocal of line #1 which follows the perpendicular rule.
We write system of equations:
O = 5*a
P = 15*a
a,b,c =?
------------------
a + b + c = 5a b + c = 4a
a*b/2 = 15a b/2 = 15
Now we calculate b and remaining sides:
b = 30
30 + c = 4a
c^2= 30^2 + a^2
(4a - 30)^2 = 900 + a^2
16a^2 - 240a + 900 = 900 + a^2
15a^2 = 240a
a = 16
that means that c = 4*16-30 = 34
