Question #17b3b
1 Answer
Jan 11, 2018
See the answer below....
Explanation:
We know,
#color(red)(sin^2x+cos^2x=1#
LHS:-
#1+tan^2x#
#=1+sin^2x/cos^2x#
#=(cos^2x+sin^2x)/cos^2x#
#=1/cos^2x #
#=sec^2x# (proved)
Hope it helps....
Thank you....
