Question

BIG PONT

kak help me plz,jangan jawab asal harus ada caranya nomor 11,12 dan 13​

Answer 1

Verified answer

TRiGoNoMeTRi

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ΔABC ⊥ di C

misal θ di B , maka :

sin θ = AC / AB = 5/13

cos θ = BC / AB = 12/13

tan θ = AC / BC = 5/12

csc θ = 1 / sin θ = 13/15

sec θ = 1 / cos θ = 13/12

cot θ = 1 / tan θ = 12/5

#

a + 2b + 3c = 27 ..... 1)

a + b + c = 16 ..... 2)

a = 6 .... 3)

eliminas a pada pers.1 dan pers.2

a + 2b + 3c = 27

a +   b + c   = 16

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       b + 2c = 11 ..... 4)

subs. pers 3 ke pers 2

a + b + c = 16

6 + b + c = 16

     b + c = 10 .... 5)

eliminasi b pada pers.4 dan pers.5

b + 2c = 11

b + c = 10

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      c = 1

krn c = 1 , maka

b + c = 10 → b = 9

shg, HP = { a , b , c } = { 6 , 9 , 1 }

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