Tolong bantu jawab,Thx^^​

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Tolong bantu jawab,Thx^^​

Tolong bantu jawab,Thx^^​

Penjelasan dengan langkah-langkah:

1. tan A = 3/4 = y/x

=> r =√4²+3²=√16+9=√25=5

cos A = x/r = 4/5

maka nilai 2 cos A = 2(4/5)= 8/5

2. cos a = -½√3, a kuadran II

maka a = 150°

=> tan a = tan 150° = 3