The ratio of depth to horizontal distance is the tangent of the angle of depression.
250 +tan(15°)*1500 = 651.9 . . . . . feet
All angles in a triangle add to 180 so
B = 180 - 90 - A
B = 90 - 20.8
B = 69.2
Can find b with tangent of A
tangent is opposite over adjacent.
opposite to A = 20.8 is 11.2 and adjacent is b
tan(20.8) = 11.2 / b
b = 11.2 / tan (20.8)
b = 29.5
c can be found with sine of A
sin(20.8) = 11.2 / c
c = 11.2 / sin(20.8)
c = 31.5
B = 69.2°, b = 29.5, c = 31.5
Answer:
−x^2 − 8x
Step-by-step explanation:
Lets say y is the missing value
Add -x^2 to both sides.
x^2+8x+y+−x^2=0+−x^2
8x+y=−x^2
Add -8x to both sides.
8x + y + −8x = −x^2 + −8x
y = −x^2 − 8x
So the whole equation would be
x^2 + 8x + −x^2 − 8x = 0
