If sina + 1/sina = 5 then find the value of sin2a + 1/sin2a

1.	If sina + 1/sina = 5 then find the value of sin2a + 1/sin2a
Answer» Answer: $\sin(a) + \frac{1}{ \sin(a) } = 5 \\ \sin {}^{2} a + 1 = 5sina \\ \sin {}^{2} a - 5 sina + 1 = 0$ Now SOLVE this quadratic equation because you KNOW that it is very difficult to type MATHEMATICAL CALCULATIONS on phone.

Answer»

Answer:

$\sin(a) + \frac{1}{ \sin(a) } = 5 \\ \sin {}^{2} a + 1 = 5sina \\ \sin {}^{2} a - 5 sina + 1 = 0$

Now SOLVE this quadratic equation

because you KNOW that it is very difficult to type MATHEMATICAL CALCULATIONS on phone.

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If sina + 1/sina = 5 then find the value of sin2a + 1/sin2a​

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If sina + 1/sina = 5 then find the value of sin2a + 1/sin2a