Differentiate Sin inverse of 2 X upon oneplus x square with respect to Cos inverse of 1 - x square upon oneplus x square
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Question: Differentiate sin⁻¹{2x/(1 + x²)} with respect to cos⁻¹{(1 - x²)/(1 + x²)}.
Step-by-step explanation:
Let x = tanθ
Then m = sin⁻¹ {2x/(1 + x²)}
= sin⁻¹ {2 tanθ/(1 + tan²θ)}
= sin⁻¹ (2 tanθ/sec²θ)
= sin⁻¹ (2 sinθ cosθ)
= sin⁻¹ (sin2θ)
= 2θ
and n = cos⁻¹ {(1 - x²)/(1 + x²)}
= cos⁻¹ {(1 - tan²θ)/(1 + tan²θ)}
= cos⁻¹ {(1 - tan²θ)/sec²θ}
= cos⁻¹ (cos²θ - sin²θ)
= cos⁻¹ (cos2θ)
= 2θ
We have to find dm/dn
Now, dm/dθ = 2 & dn/dθ = 2
So dm/dn = (dm/dθ) * (dθ/dn)
= 2 * 1/2
= 1
∴ d/d[cos⁻¹{(1 - x²)/(1 + x²)}] [sin⁻¹{2x/(1 + x²)}] = 1
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