Question

if sec0 =5/4then find c

os0​

Answer 1

Answer:

$sec0 = \frac{5}{4} \\ but \: sec0 = \frac{1}{cos0}$

therefore

$cos0 = \frac{1}{sec0} \\ = \frac{1}{ \frac{5}{4} } \\ = \frac{4}{5}$

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Answer 2

Answer:

secθ= 5 / 4

We need to find the value of cosθ

According to trignometric reciprocal fromula we know that

1 / secθ = cosθ

Substituting the given value of secθ in the above equation, we get

1 / secθ =cosθ

=1 / 5/ 4

= 4 / 5

Hence cosθ = 4 / 5