Just answer number 8 and 9 thank you
patulong po i brainliest ko makasagot ng tama
kung di po alam ang sagot wag nalang pong sagutan salamat
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Just answer number 8 and 9 thank you
patulong po i brainliest ko makasagot ng tama
kung di po alam ang sagot wag nalang pong sagutan salamat
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Answer:
Step-by-step explanation:
8.
cos C = (6² + 5² - 10²) / 2(6)(5) = -39 / 60 = -0.65
∠C = cos⁻¹ (-0.65)= 130.54°
9. b²=a²+c² - 2ac cosB
b²=9²+8² - 2(9)(8) cos48°
b²=81+64 - 144 cos48 = 48.64519
b = √48.64519 = 6.9746
11. a²=b²+c² - 2bc cosA
a²=10²+5² - 2(10)(5) cos52°
a² = 100+25 - 100cos52 = 63.43385
a = √63.43385 = 7.964537
12. cos B = adjacent / hypotenuse
cos 20 = a / 3
a = 3 cos20
a = 2.819