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nika2105 [10]
2 years ago
13

A ladder on a fire truck has its base at point B which is 4 metres above the ground. The ladder is extended and its other end re

sts on a vertical wall at point C, 16 metres above the ground. The horizontal distance between B and C is 9 metres. diagram not to scale 16 В. 4 Find the angle of elevation from B to C. degrees. Х The angle of elevation is​

Mathematics
1 answer:
Galina-37 [17]2 years ago
5 0

Answer:

53.1°

Step-by-step explanation:

Let x represent the wangle of elevation from B to C

Reference angle = x

Opposite side to x = 16 - 4 = 12

Adjacent = 9

Apply trigonometric ratio to find x.

Thus:

tan(x) = \frac{12}{9}

x = tan^{-1}(frac{12}{9})

x= 53.1 (nearest tenth)

Angle of elevation from B to C = 53.1°

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zalisa [80]

Answer:

\frac{4w {}^{8} }{9m {}^{4} }

Step-by-step explanation:

separate with like terms

\frac{4}{9} , \:  \frac{w {}^{9} }{w}  \: and \: \:  \frac{m {}^{5} }{m {}^{9} }

the first fraction can be left alone as it can't be simplified any further

the second fraction can be written as w⁹ ÷ w¹ , when the bases are the same and division is involved subtract the powers: 9 - 1 = 8, so it's simplified to w⁸

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putting it together:

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2 years ago
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