1.

TEACH YOUR SELF MATHE1-cos Asin Al +coS Asin A

Answer»

sinA/1-cosA =1 +cosA/sinA

L.H.S=sinA/1-cosA

=sinA(1+cosA)/(1-cosA)(1+cosA)

=sinA(1+cosA)/1-cos^2(A)

=sinA(1+cosA)/sin^2(A)

=1 +cosA/sinA

=R.H.S



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