Question 1206138
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As the statement of the problem says, there are many different equivalent forms of the given expression.  And many of them do not look at all similar.<br>
Here is an equivalent form very different from the one shown by the other tutor.<br>
sin^2(x) sec^2(x) − sin^2(x)<br>
sin^2(x)(sec^2(x)-1)<br>
sin^2(x)(tan^2(x))<br>