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(a+2)sinalpha+(2a-1)cosalpha=(2a+1)iftan...

`(a+2)sinalpha+(2a-1)cosalpha=(2a+1)iftanalpha"i s"` (a) `3/4` (b) `4/3` (c) `2a(a^2+1)` (d) `(2a)/(a^2-1)`

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If y^2=4b(x-c) and y^2 =8ax having common normal then (a,b,c) is (a) (1/2,2,0) (b) (1,1,3) (c) (1,1,1) (d) (1,3,2)

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