Mathematics

Problem

For an angle

x

it is given that

\sin x=\dfrac{7}{25}

and

\cos x=\dfrac{24}{25}

. (a) Find

\tan x

. (b) Using the value of

\tan x

, evaluate the expression

E=\frac{1-\tan^{2}x}{1+\tan^{2}x}

and simplify your answer.