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3 years ago

Find the exact value of cos210 using the unit circle

Mathematics

1 answer:

Eduardwww [97]3 years ago

3 0

Cos 210° = cos ( 180° + 30° ) - cos 30° = - √3/2

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Please help!!!

navik [9.2K]

The right answer is: x + x + 2 + 9 = 29

Step-by-step explanation:

According to given statement,

Side 1: 9 units

Side 2: x units

Side 3: x+2 units

The perimeter of a triangle is given by

$Side1+Side2+Side3=P\\$

Putting the values we get

$(9) + (x) + (x+2) = 29\\9+x+x+2=29\\x+x+2+9=29$

Hence,

The right answer is: x + x + 2 + 9 = 29

Keywords: Perimeter, triangle

Learn more about perimeter at:

#LearnwithBrainly

5 0

4 years ago

In a fruit punch drink, the 3 ingredients are apple juice, orange juice and cranberry juice. If

Vesna [10]

Answer:

$Cranberry:Apple:Orange = 7:5:8$

Step-by-step explanation:

Given

$Apple = 1/4$

$Orange = 2/5$

Required

Determine the ratio of Cranberry to Apple to Orange

First, we calculate the fraction of Cranberry using:

$Cranberry + Apple + Orange = 1$

Substitute values for Apple and Orange

$Cranberry + 1/4+ 2/5= 1$

Collect Like Terms

$Cranberry = 1- 1/4- 2/5$

Take LCM

$Cranberry = \frac{20 - 5 - 8}{20}$

$Cranberry = \frac{7}{20}$

The ratio is then represented as:

$Cranberry:Apple:Orange = 7/20:1/4:2/5$

Multiply through by 20

$Cranberry:Apple:Orange = 20(7/20:1/4:2/5)$

$Cranberry:Apple:Orange = 20*7/20:20*1/4:20*2/5$

$Cranberry:Apple:Orange = 7:5:8$

8 0

3 years ago

Consider the quadratic equation: 5x2 + 2x + 1 = 0. 1) Which statement is true about the roots of the given quadratic equation? A

IRINA_888 [86]

Hello!

In math, there is always something called the discriminant. This is represented by the equation $b^{2} -4ac$ , when a quadratic = $ax^{2} + bx + c$ . The discriminant tells you what roots an equation has. A discriminant of over 0 represents 2 real roots, a discriminant of 0 = 1 real root, and a discriminant of <0 is 0 real roots (2 complex roots)