Penjelasan dengan langkah-langkah:
VEKTOR danTRIGONO
1.
a. p.q = 8 × 10 × cos 90°
= 80 × 0
= 0
b. p.q = 12.8 + 23.–2
p.q = 96 – 46
p.q = 50
2. a. a = 4i + 5j
b = –2i + j
c = 3i – 2j
b. 1. a + b = [ 2 6 ]
2. 3c – 2a = (9-8, 15+4) = [1 19]
3. 2a + 3b – 4c = (8–6–12, 10+3+8) = [–10 21]
3. sudut A= 60° , C= 90°, → B = 30°, AC = 8 cm
AB = 16 cm, BC = 8√3 cm
4.
a. sin a = 3/5
b. tan a = 3/4
c. cos a = 4/5
d. cosec a = 5/3
e. cot a = 4/3
f. cos ß = 3/5
g. Sec ß = 5/3
h. sin ß = 4/5
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Penjelasan dengan langkah-langkah:
VEKTOR danTRIGONO
1.
a. p.q = 8 × 10 × cos 90°
= 80 × 0
= 0
b. p.q = 12.8 + 23.–2
p.q = 96 – 46
p.q = 50
2. a. a = 4i + 5j
b = –2i + j
c = 3i – 2j
b. 1. a + b = [ 2 6 ]
2. 3c – 2a = (9-8, 15+4) = [1 19]
3. 2a + 3b – 4c = (8–6–12, 10+3+8) = [–10 21]
3. sudut A= 60° , C= 90°, → B = 30°, AC = 8 cm
AB = 16 cm, BC = 8√3 cm
4.
a. sin a = 3/5
b. tan a = 3/4
c. cos a = 4/5
d. cosec a = 5/3
e. cot a = 4/3
f. cos ß = 3/5
g. Sec ß = 5/3
h. sin ß = 4/5