Question 1170280
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(1)  We are given cos(-105°) = -0.26.

     Cosine is an EVEN function.

     THEREFORE,  cos(105°) = cos(-105°) = -0.26.      <U>ANSWER</U>





(2)  We are given  csc(-105°) = -1.03,

     csc(-105°) = by the definition = {{{1/sin(-105^0)}}}.

     Sine is an ODD function :  sin(-105°) = - sin(105°).     (*)

     THEREFORE,  csc(105°) = {{{1/sin(105^o)}}} = due to (*) = - {{{1/sin(-105^o)}}} = - csc(-105°) = - (-1.03) = 1.03.    <U>ANSWER</U>
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Solved.


All questions are answered.