Question

Please somebody help in solving question 20
Correct answer will be marked as the brainliest

Answer 1

☑Heya mate here is your answer ⤵

▶Given, x = a(θ − sin θ)

➡dxdθ = a(1 − cos θ)y = a(1 − cos θ)

➡dydθ = a(0 + sin θ) = a sin θdydx = dydθ×dθdx = a sin θa(1 − cos θ) = sin θ(1 − cos θ)

➡dydx = 2 sin (θ2) cos (θ2)2 sin2(θ2) = cot (θ2)

➡d2ydx2 = −12 cosec2(θ2) dθdx

➡d2ydx2 = −12 cosec2(θ2) × 1a(1 − cos θ)

➡[d2ydx2]θ=π = −12cosec2(π2) × 1a(1 − cos π) =−12×1×12a = −14a

✨Hope it helps you.....

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