ABC is a triangle and PQ is parallel to BC.BC=12.6cm, PQ=8.4 cm and AQ= 7.2 cm.Find AC
1 answer:
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Answer:
Step-by-step explanation:
The principal, real, root of:
= 0.164316767
All roots:
0.164316767
−0.164316767
0.027 is not a perfect square
Answer:
The answer to your question is: the first option - 9/
Step-by-step explanation:
Process
cosФ = adjacent side / hypotenuse
-1/9 = adjacent side / hypotenuse
adjacent side = -1 hypotenuse = 9
c² = a² + b²
b² = c² - a²
b² = 81 - 1
b = b = opposite side
But b is negative because we are in the third quadrant.
b = -
Finally csc Ф = hypotenuse / opposite side
csc Ф = - 9 /