Question

Tugas mtk wajib kls 10
jawab pake cara, no 9-13

jawaban asal tanpa cara dihapus

Answer 1

Penjelasan dengan langkah-langkah:

9] sin a

= y/r

= BC/AC

= 7/25

10] cos (-240°)

= cos 240°

= cos (180° + 60°)

= - cos 60°

= -1/2

11] cos 265°

= cos (270° - 5°)

= cos 270° . cos 5° + sin 270° . sin 5°

= 0 . cos 5° + (-1) . p

= -p

12] sin a = tinggi / panjang tangga

sin a = 2/4

sin a = 1/2

sudut a = 30°

13] tan a = tinggi tiang / panjang bayangan

tan 30° = tinggi tiang / 10

Tinggi tiang = 1/3 √3 . 10

Tinggi tiang = (10/3) √3 m

Answer 2

Matematika

Nomor 9

samping = √(25² - 7²)

= √(625 - 49)

= √576

= 24

sin α = depan / miring

= 7 / 25

jawaban A

Nomor 10

= cos -240

= - cos (180 + 60)

= - cos 60

= - ½

jawaban C

Nomor 11

= cos 265

= - cos (180 + 85)

= - cos 85

= - sin (90 - 5)

= - sin 5

= -p

jawaban D

Nomor 12

sin α = a/c

sin α = 2/4

sin α = ½

sin 30° = ½

sudut yang terbentuk 30°

jawaban B

Nomor 13

t = 10 × tan 30

= 10 × ⅓ √3

= 10/3 √3 m

jawaban A