IIT JEE Main PYQ 9 April 2024 shift 2

[@user-19ulzgf-vnd-gtr]

4:50 Sir I think we can't directly write cos2theta dtheta You need to differentiate the substituted equation w.r.t theta first then we can convert the integral in terms of theta Youe next step was correct only since you re-substituted theta for x and found the value of cos2theta in terms of x Just wanted to clear the previous step

[@Michael-kaiser1809]

Put x=cosa then easy conversion...

[@Kishore48xD]

Paper ke din toh dimag chalta hi nhi, toh uss din maine Tan-1(2x/1-x²) = π - 2tan-1x (if x>1) se kra tha... Aapne sir kaafi simple bataya✨

[@raghvendrasingh1289]

(tan t)^2 = (1 - cos 2t)/(1+cos 2t) hence we can put x = cos 2t for simplification.

[@sanjeevsir29077]

@@raghvendrasingh1289 good approach

[@gunajothisekar5053]

we can actually do it by taking x=cos2y

[@surendrakverma555]

Thanks Sir

[@mandar_desai34]

Video completed As many have suggested, x=cos(2a) substitution helps

[@XyterVicky]

12th +jee mains ka class kab se start ho rha hai sir

[@XyterVicky]

Online batch

[@UmairKhan-450]

Aaj se

[@XyterVicky]

@@UmairKhan-450 kon sa app se course kharid sakta hu bhai bta do mujhe v

[@rishabhtiwari2325]

Did it by method 2, still have to memorise all inv formulae

[@pradyumnanayak9844]

🙏

[@technicallightingfriend4247]

It's halwa Actually already done in indefinite integral

[@sanjeevsir29077]

Yes😊

[@manojkushwaha3734]

Very nice ❤

[@sanjeevsir29077]

Thanks 🤗