Question 1179435
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<pre>

    8*sec^2(x) − 8 = 0


implies


    sec^2(x) = 1

    sec(x) = {{{sqrt(1)}}} = +/- 1

    cos(x) = +/- 1.


In the given interval, there are 2 solutions  x= 0  or  x= {{{pi}}}.    <U>ANSWER</U>
</pre>

Solved, answered, explained and completed.