Cos 150+sin (-30)+tan (-60) + cot 60 adalah?
Matematika
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Pertanyaan
Cos 150+sin (-30)+tan (-60) + cot 60 adalah?
1 Jawaban
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1. Pengguna Menjawab johannahelina
cos150° + sin(-30°) + tan(-60°) + cot60°
= - cos(180° - 30°) - sin30° - tan60° + cot60°
= - cos30° - sin30° - tan60° + cot60°
= 1/2√3 - 1/2 - √3 + 1/3√3
= 1/2√3 - 1/2 - 2/3√3
= 3/6√3 - 1/2 - 4/6√3
= - 1/6√3 - 1/2