Segitiga KLM memiliki koordinat K (-5 , -2) , L (3 , -2) dan M (-5 , 4) nilai cos L dan tan M berturut-turut adalah ...
Diketahui segitiga PQR memiliki koordinat P (-3 , 2) , Q (-3 , -2) dan R (3 , -2) nilai 3 sec R per cosec Q = ....
#pakai cara lengkap
semdavidtimothy
KL = Akar (3--5 )^2 + (-2--2)^2 KL = akar 64 KL = 8 KM = akar (-5--5)^2 + (4--2)^2 KM = akar 36 KM = 6 LM = 10 cos L = KM / LM = 8/10 = 4/5 tan M = KL / KM = 8 /6 = 4/3
2. PQ = akar (-3--3)^2 + (2--2)^2 PQ = akar 16 PQ = 4 PR = akar (-3-3)^2 + (2--2)^2 PR = akar 36 + 16 PR = akar 52 PR = 2 akar 13 OR = akar (-3-3)^2 + (-2--2)^2 QR = akar 36 QR = 6 Cos R = (akar 52)^2 + 6^2 - 16 / 2 × akar 52 × 6 Cos R = 52 + 36 - 16 / 12 akar 52 Cos R = 72 /12 akar 52 Cos R = 6 / akar 52 Cos Q = 6^2 + 4^2 - (akar 52)^2 / 2 × 4 ×6 Cos Q = 36 + 16 - 52 / 2 × 4 ×6 Cos Q = 0 Q = 90 3 sec R cosec Q 3 1/cos R 1/ sin Q 3 × akar 52 /6 1/sin 90 akar 52 / 6 2 akar 13/6 1/3 × akar 13 maaf kalo salah
KL = akar 64
KL = 8
KM = akar (-5--5)^2 + (4--2)^2
KM = akar 36
KM = 6
LM = 10
cos L = KM / LM = 8/10 = 4/5
tan M = KL / KM = 8 /6 = 4/3
2. PQ = akar (-3--3)^2 + (2--2)^2
PQ = akar 16
PQ = 4
PR = akar (-3-3)^2 + (2--2)^2
PR = akar 36 + 16
PR = akar 52
PR = 2 akar 13
OR = akar (-3-3)^2 + (-2--2)^2
QR = akar 36
QR = 6
Cos R = (akar 52)^2 + 6^2 - 16 / 2 × akar 52 × 6
Cos R = 52 + 36 - 16 / 12 akar 52
Cos R = 72 /12 akar 52
Cos R = 6 / akar 52
Cos Q = 6^2 + 4^2 - (akar 52)^2 / 2 × 4 ×6
Cos Q = 36 + 16 - 52 / 2 × 4 ×6
Cos Q = 0
Q = 90
3 sec R cosec Q
3 1/cos R 1/ sin Q
3 × akar 52 /6 1/sin 90
akar 52 / 6
2 akar 13/6
1/3 × akar 13
maaf kalo salah