( sec(\theta )+ cos(\theta ) )( sec(\theta )- cos(\theta ) )= tan(^ ( 2) \theta )+ sin(^ ( 2) \theta) ?

1 Answer
Feb 17, 2018

See the answer below...

Explanation:

#(sectheta+costheta)(sectheta-costheta)#

#=sec^2theta-cos^2theta#

#=(1+tan^2theta)-(1-sin^2theta)#

#=1+tan^2theta-1+sin^2theta#

#=tan^2theta+sin^2theta" "#[Proved...]

Formula Reference:- click here.