NDA MATHEMATICS QUIZ - 27

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Question 1:

If x=acos3θ;y=asin3θ , then dydx at θ=π4 will be

Question 2:

If x=a(cosθ+θsinθ);y=(asinθθcosθ) then d2ydx2 will be equal to

Question 3:

If sinx=2t1+t2;tany=2t1t2 then dydx equals

Question 4:

If x=3at1+t3;y=3at21+t2 then dydx at t=12 equal is:

Question 5:

If x=2t1+t2,y=1t21+t2 then dydx equals

Question 6:

If x=a(tsint) and y=a(1cost) and d2ydx2=k1sin4t2 where k will be equal to

Question 7:

If y=tan(12cos11t21+t2+12sin12t1+t2) ;0t1 and x=2t1t2 then dydx=

Question 8:

If y=tan11+t21t and x=tan1t then dydx=..

Question 9:

If u=tan1(x1x2) and v=cos1(2x21) then dudv=

Question 10:

If x=3cosθcos3θ,y=3sinθsin3θ then d2ydx2=