( a - b ) ( a + b) + (b -c ) ( b+ c ) + ( c - a) ( c + a ) = o
2 answers:
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we know that, the mixture amount is the sum of 11 + p, or 11 + p = m.
we also know that, the total value is also a sum of 25.3 + 4.5p = 3.29m.
Answer:
8.7°
Step-by-step explanation:
The above problem can be represented by a right angled triangle with height of 7 m, hypotenuse = AB.
The base of the triangle is gotten by finding the diagonal of the road. That is using Pythagoras theorem:
base² = 43² + 15²
base² = 2074
base = 45.54 m
Using trigonometric function to find angle A:
tan(A) = base / height
tan(A) = 45.54 / 7
tan(A) = 6.506
A = tan⁻¹ (6.506)
A = 81.3°
Angle of depression = 90° - A = 90 - 81.3
Angle of depression = = 8.7°
