Question 1205833
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This equation is good to solve it MENTALLY in your head.



<pre>
sin^2(x) - 5 = cos^2(x) - 1


Transform it to equivalent equation

    sin^2(x) - cos^2(x) = 4.


But  sin^2(x)  and  cos^2(x)  are non-negative and not greater than 1.


Hence, this equation has no solutions.
</pre>

Solved (mentally).