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Q) Find dy/dx, if y=tan^(−1) ((1+sinx)/cosx) #cbseclass12 #cbse2026 #maths # #mathsschool

Q) If y=(x+√(1+x^2 ))^n, then show that (1+𝑥^2 ) (𝑑^2 𝑦)/(𝑑𝑥^2 )+𝑥 𝑑𝑦/𝑑𝑥=𝑛^2 𝑦 #cbse

Q) If 𝑥=3sin t−sin 3t,y=3cos t−cos 3t find dy/d𝑥 and prove that (d^2 y)/(d𝑥^2 )=(−cosec^3 2t⋅cos