January 2019 1 37 Report
1.Hitunglah sin a = 4/5,a sudut lancip.Hitunglah tan 2a! 2. Di ketahui cos A =5/13 dan sin B= 24/25,sudut A dan B lancip. Hitunglah cos (A+B) dan cos (A-B).mohon bantuannya ya...
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