C 440= 400*1.10 I have to make it at least 20 characters
Value of cos(x+π) = ![\bold{\frac{\sqrt{3} }{2}}](https://tex.z-dn.net/?f=%5Cbold%7B%5Cfrac%7B%5Csqrt%7B3%7D%20%7D%7B2%7D%7D)
Given cosine of x = ![-\frac{\sqrt{3} }{2}](https://tex.z-dn.net/?f=-%5Cfrac%7B%5Csqrt%7B3%7D%20%7D%7B2%7D)
i.e., cos(x) = ![-\frac{\sqrt{3} }{2}](https://tex.z-dn.net/?f=-%5Cfrac%7B%5Csqrt%7B3%7D%20%7D%7B2%7D)
Also cos(
) =
. So x =
.
We need to find cos(x+π) = cos(
).
But its value is not easy to find. So we use trigonometric formulas.
We have the trigonometric formula, cos (x+π) = - cos(x) = -
= ![\bold{\frac{\sqrt{3} }{2}}](https://tex.z-dn.net/?f=%5Cbold%7B%5Cfrac%7B%5Csqrt%7B3%7D%20%7D%7B2%7D%7D)
Cos(x+π) lies in the 3rd quadrant. So there cosine has negative values. That is why, cos (x+π) = - cos(x).
Learn more about Cos(x+π) trigonometric formula at brainly.com/question/12243383
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√80.
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We can rewrite as 4√5. To multiply the 4 back in to the square root, we square it and get √16*5 = √80.
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Hope this helps!
Answer:
130 is not measure of the triangle .
Step-by-step explanation:
because angles are 65० ,75०,40० .
and 130 is not possible sum of any adjacent sides of triangle
3b=y+3x
To solve for B you need to put B before the equals sign