Answer is C 7 D -12 for this question
She multiplied it by 5, because that would make the equation:
2.5 + y = 125
So when we add -y and y cancel out
Answer:
,
and
.
Step-by-step explanation:
Given a point (x, y) with respect to origin and in rectangular coordinates, the exact value of sine, secant and tangent functions are, respectively:
![\sin O = \frac{y}{\sqrt{x^{2}+y^{2}}}](https://tex.z-dn.net/?f=%5Csin%20O%20%3D%20%5Cfrac%7By%7D%7B%5Csqrt%7Bx%5E%7B2%7D%2By%5E%7B2%7D%7D%7D)
![\sec O = \frac{1}{\cos O} = \frac{\sqrt{x^{2}+y^{2}}}{x}](https://tex.z-dn.net/?f=%5Csec%20O%20%3D%20%5Cfrac%7B1%7D%7B%5Ccos%20O%7D%20%3D%20%5Cfrac%7B%5Csqrt%7Bx%5E%7B2%7D%2By%5E%7B2%7D%7D%7D%7Bx%7D)
![\tan O = \frac{\sin O}{\cos O} = \frac{y}{x}](https://tex.z-dn.net/?f=%5Ctan%20O%20%3D%20%5Cfrac%7B%5Csin%20O%7D%7B%5Ccos%20O%7D%20%3D%20%5Cfrac%7By%7D%7Bx%7D)
Given that
and
, the exact values of sine, secant and tangent are:
![\sin O = \frac{7}{\sqrt{(-3)^{2}+7^{2}}}](https://tex.z-dn.net/?f=%5Csin%20O%20%3D%20%5Cfrac%7B7%7D%7B%5Csqrt%7B%28-3%29%5E%7B2%7D%2B7%5E%7B2%7D%7D%7D)
![\sin O \approx 0.919](https://tex.z-dn.net/?f=%5Csin%20O%20%5Capprox%200.919)
![\sec O = \frac{\sqrt{(-3)^{2}+7^{2}}}{-3}](https://tex.z-dn.net/?f=%5Csec%20O%20%3D%20%5Cfrac%7B%5Csqrt%7B%28-3%29%5E%7B2%7D%2B7%5E%7B2%7D%7D%7D%7B-3%7D)
![\sec O \approx -2.539](https://tex.z-dn.net/?f=%5Csec%20O%20%5Capprox%20-2.539)
![\tan O = \frac{7}{-3}](https://tex.z-dn.net/?f=%5Ctan%20O%20%3D%20%5Cfrac%7B7%7D%7B-3%7D)
![\tan O = -\frac{7}{3}](https://tex.z-dn.net/?f=%5Ctan%20O%20%3D%20-%5Cfrac%7B7%7D%7B3%7D)
Answer:
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Step-by-step explanation:
The answer is unidentified