Bantu jawab dari no 1 – 7 ya lengkap dngn caranya msing”Terimakasih

Trigonometri

1. 108⁰ = 108⁰ / 180⁰ = 3π/5
π=180⁰
⇒Opsi D

2. A = 4π/5
A = 4(180⁰)/5=144⁰
⇒Opsi E

3. Cos c = x/r
24/25
⇒Opsi B

4.Cos Q = x/r
PR= 5 => y
QR = 13 => r
Siku siku di P
x=√(r²-y²)
=√(13²-5²)
=√(169-25)
=√(144)
=12
Cos Q = 12 / 13
⇒Opsi C

5.Segitiga ABC, siku siku di B
Sin A = 3/5
< A lancip dan AC = 10 cm
AB=…
Sin A = y/r
x =√(5²-3²)
= √(25-9)
=√(16)
=4
AC = r => 5 = 10
AB = y => 3 = 6 (√)
BC = x => 4 = 8
⇒Opsi B

6. Sin α = 1/5 dan α sudut lancip
Cos α = x/r
Sin α = y/r
x=√(r²-y²)
=√(5²-1²)
=√(25-1)
=√(24)
=√(4×6)
=2√(6)
Cos α = x/r
2√(6) / 5
⇒Opsi B

7. Cos α = 6/10 dan α sudut lancip
Tan α = y/x
= 8/6
⇒Opsi B

Cos α = x/r
y=√(r²-x²)
=√(10²-6²)
=√(100-36)
=√(64)
=8

Demikian Semoga Membantu dan Bermanfaat!

Kelas:10 / X SMA
Mapel: Matematika
Bab:7
Kode:10.2.7
Kata Kunci:Trigonometri

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