April 2019 1 91 Report
Mohon jawabannya. Jawaban terbaik akan saya jadikan sebagai jawaban tercerdas.


Carilah nilai sin (a + b), cos (a+b) , dan tan (a - b) jika diketahui
1) sin a = 4/5, cos b = 5/13, a dan b di kuadran I
2) sin a = 2/3, cos b = 3/4, a di kuadran II dan b di kuadran IV

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