Prove the following: `4tan^(-1)1/5-tan^(-1)1/(70)+tan^(-1)1/(99)=pi/4` `2t a n^(-1)1/5+s e c^(-1...

This is the Solution of Question From RD SHARMA book of CLASS 12 CHAPTER INVERSE TRIGONOMETRIC FUNCTIONS This Question is also available in R S AGGARWAL book of CLASS 12 You can Find Solution of All Question From RD SHARMA and R S AGGARWAL book from class 6-12 on our app DOUBTNUT for Free #rdsharmasolution #INVERSETRIGONOMETRICFUNCTIONS #rdsharmaclass12 #class12 #cbse #rdsharma #doubtnut ==== QUESTION TEXT ==== Prove the following: `4tan^(-1)1/5-tan^(-1)1/(70)+tan^(-1)1/(99)=pi/4` `2t a n^(-1)1/5+s e c^(-1)(5sqrt(2))/7+2tan^(-1)1/8=pi/4` === DOWNLOAD DOUBTNUT TO ASK ANY MATH QUESTION === https://doubtnut.app.link/PqiFMoFvlP ==== SCORE 100% WITH DOUBTNUT ==== Doubtnut App has video solutions of ALL the NCERT questions from Class 6 to 12 (including IIT JEE). You can also ask any Math question and get a video solution for FREE from a library of more than 1 Lakh Math Videos ==== FOLLOW US ON FACEBOOK ==== Doubtnut PAGE: https://www.facebook.com/doubtnut DOUBTNUT IIT JEE Group: https://www.facebook.com/groups/251747588948573 ==== WATCH DAILY LIVE CLASSES ON YOUTUBE ==== 5:30 PM - Class 9 6:30 PM - Class 10 7:15 PM - Class 11 8:15 PM - Class 12 9:15 PM - Class 13 (DROPPERS)