Question

If cosB =3/5, find the value of sec^2B-1

Answer 1

hello friend your answer is here ✌✌

cos B = 3/5

we know that secB = 1/cosB

so secB = 5/3

sec²B = 25/9

sec²B - 1 = 25/9 - 1

sec²B - 1 = 16/9

thanks ☺☺

Answer 2

Solution ...



cos B = 3/5

we know that :-

sec B = 1/cosB

So, sec B = 5/3.


${ \sec}^{2} b \: - 1 \\ \\ = { (\frac{5}{3} )}^{2} - 1 \\ \\ = \frac{25}{9} - 1$
$= \frac{25 - 9}{9} \\ \\ = \frac{16}{9} ..........is \: the \: required \: answer \: of \: your \: question.........$


Hope this will help you...



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