Answer:
Step-by-step explanation:
sin(x) + tan(x)=sin(X) + sin(x)/cos(x)
=sinx(1+1/cosx)
=sinx(1+secx)
=1+secx/cosecx. (Since sinx=1/cosecx)
Hence LHS=RHS proved
Answer:a
Step-by-step explanation: 20 x 25=500
5