If cos^(-1)(2/3x)+cos^(-1)(3/4x)=π/2 (x3/4), then x is equal to (a) √145/10 (b) √146/12 (c) √145/12 (d) √145/11 Downloads our APP for FREE Study Material ,Video Class ,Test paper & Mock test etc... Click to Download Impetus Gurukul Free Learning App here https://play.google.com/store/apps/de... To buy complete Course please Visit– https://www.impetusgurukul.com or contact on 7047832474 join Impetus Gurukul live classes via the official Website: https://live.impetusgurukul.com Our Social links Telegram: https://t.me/impetusgurukul Facebook: / impetusgurukul LinkedIn: / dr-sharad. . twitter: / impetussharad