Evaluate all trig functions

Question

cotø= -3 and sinø= √10/10

Answer 1

cot(phi)=-3

 phi.    = -18.4 degrees

          =-0.3217 rad

          =-0.3217+pi*n.           n = 0,1,2,3,---------

 

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sin(phi)=sqrt(10)/10

 

    phi=18.4 degrees

         =0.3217 rad

         =0.3217+2*pi*n.        n =0,1,2,3,---------

 also

  phi =161.6 degrees

        =2.82 red

         =2.82+2*pi*n.             n=0,1,2,3,-----------