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WAEC Further Mathematics 2013 Paper

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Question : 5

Total: 40

If

f(x) = x^{2}

g(x) = \sin x

, find g o f.

$\sin^{2} x$
$\sin x^{2}$
$(\sin x)x^{2}$
$x \sin x$

Solution:

$f(x) = x^{2}, g(x) = \sin x$

$g \circ f = g(x^{2}) = \sin x^{2}$

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