Question #98d5c

1 Answer
Oct 29, 2017

Refer to explanation below.

Explanation:

#LHS=(1-sinA)/(1+sinA)#

#=(1-sinA)/(1+sinA)*(1-sinA)/(1-sinA)#

#=(1-sinA)^2/(1-sin^2A)#

#=(1-sinA)^2/cos^2A#

#=((1-sinA)/cosA)^2#

#=(1/cosA-sinA/cosA)^2#

#=(secA-tanA)^2#

#=RHS#