Jawaban:

a. tinggi² = 25²-24² = 625-576 = 49

tinggi =√49 = 7

sin a = depan/miring = 7/25

cos a= samping/miring = 24/25

Tan a = depan/samping = 7/24

sec a= 1/cos a= 1/24/25 = 25/24

cosec a = 1/sin a = 1/7/25= 25/7

cotan a = 1/ tan a = 1/7/24 = 24/7

b. tinggi² = 17²-15² = 289-225 = 64

tinggi =√64 =8

sin a = depan/miring = 15/17

cos a= samping/miring = 8/17

Tan a = depan/samping = 15/8

sec a= 1/cos a= 1/8/17 = 17/8

cosec a = 1/sin a = 1/15/17 = 17/15

cotan a = 1/ tan a = 1/15/8 = 8/15

c. hipotenusa² = 10²+8²= 100+64=164

hipotenusa =√164= 2√41

sin a = depan/miring = 10/2√41

cos a= samping/miring = 8/2√41

Tan a = depan/samping = 10/8 = 5/4

sec a= 1/cos a= 1/8/2√41 = 2√41/8

cosec a = 1/sin a = 1/10/2√41 = 2√41/10

cotan a = 1/ tan a = 1/5/4= 4/5

d. alas²= 20²-12² = 400-144 = 256

alas = √256 = 16

sin a = depan/miring = 12/20= 3/5

cos a= samping/miring = 16/20 = 4/5

Tan a = depan/samping = 12/16= 3/4

sec a= 1/cos a= 1/4/5= 5/4

cosec a = 1/sin a = 1/3/5 = 5/3

cotan a = 1/ tan a = 1/3/4 = 4/3