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SinA=3/5 perpendicular /base
so calculating cos A by pythogoras we get cos A=4/5.......(25=+9)...x=4 or x=-4
tanA =sinA/cosA
3/5 upon 4/5= 3/4  or 3/5 upon -4/5
substituting the value in the given equation
3/4+5/4  or -3/4 -5/4............(1/cos A =sec A=5/4 or sec A=-5/4)
which is equal to 2 or -2

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