Contoh soal 1:
Tentukan: Sin A, Cos A, Tan A, Cosec A, Sec A, dan Cot A
Pembahasan dan kunci jawaban:
MI = √(5² + 7²)
MI = √(25 + 49)
MI = √74
Sin A = DE/MI = 5/√74 = 5/74 √74
Cos A = SA/MI = 7/√74 = 7/74 √74
Tan A = DE/SA = 5/7
Cosec A = MI/DE = √74/5 = ⅕ √74