document.write( "Question 1152665: If 0 ≤ x ≤ 180, find, in degrees, all angles x, which satisfy 0.2^(cos x) < 1. \n" ); document.write( "

Algebra.Com's Answer #774726 by ikleyn(52802) $\"\"$ $\"About$

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document.write( "ANSWER.  The angles  0 <= x < 90 degrees.\r\n" );
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document.write( "Explanation.  The angles listed under the answer, i.e.   0 <= x < 90 degrees, OBVIOUSLY, satisfy the given inequality.\r\n" );
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document.write( "The complement to this set, i.e. angles  90 <= x <= 180 degrees, OBVIOUSLY, do not satisfy the given inequality,\r\n" );
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document.write( "since then  cos(x) is negative and    is then   = ,  where t is a positive index.\r\n" );
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