Question

Tolong bantuin aku. Jawab sebisanya aja nggak apa2 kok. Asalkan jangan kurang dari 3

*pake cara
*tolong bantu senin dikumpul

Answer 1

5.
t/r = sin 60
r = t/sin 60 = 30/(1/2 √3)= 60/√3= (20/3)√3

4. tan 30 = t/7.200
t = 7.200 . tan 30
t = 7.200 x (1/3 √3)= 2.400 √3

3.
cos 45 = AD/AB
AB = AD/ cos 45 = (6√2)/ ( 1/2 √2) = 6/(1/2) = 12

tan 60 = AC/AB 
AC = AB. tan 60 = 12 (√3) = 12√3

2.
sin 60 = AB/AD
AB = AD. sin 60 
AB = 24√2 ( 1/2 √3) = 12√6

sin 45 =  AB/AC
AC = AB/ sin 45
AC = (12√6)/ (1/2 √2)
AC = 24 √3

1)
tan 45 = AC/AB
1 = AC/AB
AC =AB
2x-1 = x+ 4
x = 5
AC = 2x -1 = 9

sin 45 = AC/BC
BC  = AC/ sin 45 
BC = 9/(1/2 √2) = 18/√2 = 9√2