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Aloiza [94]
2 years ago
8

Please do number 19 for me.

Mathematics
2 answers:
Natalka [10]2 years ago
8 0

Answer:

x = 9

angle \: abc = 8x + 6x + 6x \\   20x = 180  \\ x =  \frac{180}{20}  \\  x= 9

plzz \: \:  mark \: as \: brainliest

dedylja [7]2 years ago
4 0
Angles in triangle add to 180 degrees
20x=180
x=9
Angle ABC is the top one
8x9=72
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gulaghasi [49]

(a) Yes all six trig functions exist for this point in quadrant III. The only time you'll run into problems is when either x = 0 or y = 0, due to division by zero errors. For instance, if x = 0, then tan(t) = sin(t)/cos(t) will have cos(t) = 0, as x = cos(t). you cannot have zero in the denominator. Since neither coordinate is zero, we don't have such problems.

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(b) The following functions are positive in quadrant III:

tangent, cotangent

The following functions are negative in quadrant III

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A short explanation is that x = cos(t) and y = sin(t). The x and y coordinates are negative in quadrant III, so both sine and cosine are negative. Their reciprocal functions secant and cosecant are negative here as well. Combining sine and cosine to get tan = sin/cos, we see that the negatives cancel which is why tangent is positive here. Cotangent is also positive for similar reasons.

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3 years ago
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Step-by-step explanation:

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