Question

sec(a+b)+sec(a-b)=2seca​

Answer 1

Answer:

Answer:

Step-by-step explanation:

LHS=sec(a+b)+sec(a-b)

=sec(a+b+a-b)

=2seca

=RHS

Answer 2

Answer:

Step-by-step explanation:=sec( a+b)+sec(a-b)=2seca

=Take lhs equation

=Multiply sec in both trem by a-b and a+b respectively

=seca+secb+seca-secb

=Cancel +secb and -secb

=seca+seca=2seca

=lhs=rhs

Hence proved