Mathematics, 20.07.2019 11:30 DD8156
Which shows all the exact solutions of 2sec^2x-tan^4x=-1 ? give your answer in radians.
Answers: 2
:![2[1+tan^2(x)]-tan^4(x)=1](/tpl/images/0111/5140/f7a57.png)
:
:
:
is not a real root, we can rule out 
and 
, which are approximately 
and 
respectively. 
, then we get 
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Which shows all the exact solutions of 2sec^2x-tan^4x=-1 ? give your answer in radians....
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