Q.

Ltx0esinax-esinbxtan 2x=

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a

2a-b

b

a-b2

c

a+b

d

a-b

answer is B.

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Detailed Solution

     ltx0 esin ax-esin bxtan 2x =ltx0 esin bxesin ax-sin bx-1(sin ax-sin bx) (sin ax-sin bx)x xtan 2x =1(a-b).12=a-b2

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