Question

1+cosA/sinA= 1/1-cosA​

Answer 1

Answer:

LHS is multiplied by 1-cosA

(1+cosA)(1-cosA)/{sinA(1-cosA)}

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

=sin^2A/{sinA(1-cosA)}

=sinA/(1-cosA)

Answer 2

Answer:

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Step-by-step explanation:

1. When light propagates in vacuum, there are electric field and magnetic field. These fields a) are constant in time b) have zero average value c) are perpendicular to the direction of propagation of light d) are mutually perpendicular