Nilai x yang memenuhi persamaan cos x= cos 8 phi/7 adalah…

phi= 22/7

cos x = cos 8 x phi/7

=cos 8 x 22/7/7

= cos 8 x 22

cos x = cos 176

x = 176

phi= 22/7

cos x = cos 8 x phi/7

=cos 8 x 22/7/7

= cos 8 x 22

cos x = cos 176

x = 176