Question

if sinA=-3/5 a(0,2π) the possible values of cos@/2

Answer 1

first we make both numbers as like fractions.

-2 = -2/1 and the other number is -7/2 LCM of2 and 1 is 2

-2/1 x 2/2 and -7/2

-4/2 and -7/2

we need any three r. no. between these. so, we can multiply them by say, 10

-4/2 x 10/10 and 7/2 x10/10

-40/20 and -70/20

any three r. numbers between these r : -41/20, -42/20, -43/20.

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