Check sibling questions

Ex 8.4, 4 - (i) 9 sec2 A – 9 tan2 A (A) 1 (B) 9 (C) 8 - Ex 8.4

This video is only available for Teachoo black users

 

Solve all your doubts with Teachoo Black (new monthly pack available now!)


Transcript

Ex 8.4, 4 Choose the correct option. Justify your choice. (i) 9 sec2 A – 9 tan2 A 1 (B) 9 (C) 8 (D) 0 9 sec2 A – 9 tan2 A = 9 (1 + tan2 A) – 9 tan2 A = 9 + 9 tan2 A – 9 tan2 A = 9 + 0 = 9 Hence B is the correct option

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.