Question

if (o) A=4/5 than find sinA​

Answer 1

Answer:

Given -

cos A = 4/5

To Find -

sinA

Solution -

$\sina = \sqrt{(1 - { \cos }^{2} } \: a)$

$= > \: \sina = \sqrt{( \frac{1 - 16}{25} } )$

$= > \: \sina = \sqrt{( \frac{9}{25} } )$

$= > \: \sina = \frac{3}{5}$

Now, as tanA = sin A/ cosA

$= > \: \tana = \frac{3}{5} \times \frac{5}{4}$

$= > \: \tana = \frac{3}{4}$

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Answer 2

THANKS FOR FREE POINTS

SORRY DONT KNOW THE ANSWER