Question

plz solve. ................

Answer 1

just keep in mind...
if Lim X tends to-0
THEn sinx/x=1
$(ax + x \cos(x)) \div (b \sin(x) ) \\ (ax + x \cos(x) ) \div (xbsinx \div x) \\ = x(a + \cos(x) ) \div (xb) \\ = (a + \cos(x) ) \div b \\ at \: x = 0 \\ = (a + 1) \div b$
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