Matematika

Pertanyaan

1. Tan 45°+tan 30° =
2. Sin 90°+cos60° =
3. Sin 30°×cos 60°+tan45° =

2 Jawaban

  • 1. 1+ 1/3 √3 = 1 1/3 √3
    2. 1+ 1/2 = 1 1/2
    3. 1/2 x 1/2+1 = 1 1/4
  • Bab : Trigonometri

    1). Tan 45°+ tan 30°
    = 1 + (1/3)
    √3
    = (3/3)√3 + (1/3)√3
    = (4/3)√3

    2). Sin 90°+ cos60°
    = 1 + 1/2
    = 2/2 + 1/2
    = 3/2

    3). 
    Sin 30° × cos 60° + tan45°
    = 1/2 
    × 1/2 + 1
    = 1/4 + 1
    = 1/4 + 4/4
    = 5/4

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