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ivanzaharov [21]
3 years ago
7

Helppp look at photo will mark brainliest

Mathematics
1 answer:
liberstina [14]3 years ago
5 0

Answer:

C) 12.5

 The length of BC = 12.5cm

Step-by-step explanation:

<u><em>Step(i):-</em></u>

<em>Given that  ΔABC</em>

<em>Given that  AB =  15cm and ∠A =  40°</em>

<em>we will use trigonometric function</em>

<em>                      </em>tan x = \frac{oppositeside}{adjacentside}<em></em>

<em>                    </em>tan 40^{0} = \frac{BC}{AB} = \frac{BC}{15}<em></em>

<u><em>Step(ii):-</em></u>

we know that tan40° = 0.83909

                 tan 40^{0}  = \frac{BC}{15}

                BC =  15 × tan 40°

                BC = 12.58649

                BC = 12.5cm

<u><em>Final answer:-</em></u>

 The length of BC = 12.5cm

<em></em>

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