Jika A + B + C = 180, buktikan bahwa:a. sin (A + B) = sin C

Saluranedukasion 2024-03-31T15:29:39.000Z

Jika A + B + C = 180, buktikan bahwa:a. sin (A + B) = sin C b. cos (A + B) = -cos C c. tan (A + B) = -tan C
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Jika A + B + C = 180, buktikan bahwa:a. sin (A + B) = sin C b. cos (A + B) = -cos C c. tan (A + B) = -tan C