Dijawab bagi yang bisajangan ngasal​

nomor 1.

c= √(5²+12²)

c = 13

sin α = a/c = 5/13

cos α = b/c = 12/13

tan α = a/b = 5/12

__________

nomor 2.

CD = √(4²–2²) = 2√3

sin A = CD/AC = ½ √3

cos A = AD/AC = ½

tan A = CD/AD = √3

_______

nomor 3.

a) ½ x ½ √2 + ½ √3 x ½√2

= ¼ (√2 + √6)

b) ½ √3 x 1 – 2/√2

= ½√3 – √2

c) ½√2 x ½ x ½√2 x √3/2

= ⅛ √3

________

semangat belajar…..