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1 year ago

What is the value of sin(80°)cos⁡(20°)-cos(80°)sin(20°)

Mathematics

1 answer:

Iteru [2.4K]1 year ago

5 0

Answer: sqrt 3 / 2

Step-by-step explanation: cos20°sin80°-cos80°sin20° is about 0.66 and sqrt(3)/2 is about 0.66.

Please mark as brainliest if my answer was correct and/or helpful.

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What is the value of y?

NNADVOKAT [17]

Answer:

y = 40

Step-by-step explanation:

Lets make an equation to represent the sum of the angles:

We know that the sum of angles of triangles equals 180 degrees. So based on this knowledge, the equation is :

2y + y + 10 + 50 = 180

Now we simplify:

2y + y = 3y

10 + 50 = 60

So our new equation is 3y + 60 = 180

Now all we have to do is simplify:

3y + 60 = 180

3y + 60 -60 = 180 - 60

3y = 120

3y / 3 = 120 / 3

y = 40

So the answer is 40 hope this helped

7 0

2 years ago

2 1/6* 2 5/6 IN SIMPLEST FORM

andrezito [222]

Answer:

6 5/36

Step-by-step explanation:

MARK ME BRAINLIEST?

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2 years ago

PLEASE HELP I NEED SOMEBODY TO PARAPHRASE THIS FOR ME! I'LL MARK BRAINLIEST!! 50 POINTS!!!

Mrrafil [7]

3x + 4 = 2x + 2
3x - 2x = 2 - 4
x = -2
one solution

3 0

2 years ago

Read 2 more answers

(28 POINTS)

cestrela7 [59]

Answer:

(a) $-\sqrt{10}y$

(b) $-\sqrt{3}y$

Step-by-step explanation:

(a) $\sqrt{10y^{2}}$ can also be written as $\sqrt{10}$ x $\sqrt{y^{2}}$

the $\sqrt{y^{2}}$ = ± y

Therefore :

$\sqrt{10y^{2}}$ = ± $\sqrt{10}y$

since it was given that y < 0 , then the factor will be $-\sqrt{10}y$

(b) $\sqrt{3y^{2}}$ can also be written as : $\sqrt{3}$ x $\sqrt{y^{2}}$

Therefore , one of the factor is $-\sqrt{3}y$

3 0

2 years ago

Choices; a) 60degree b) 70degree c)80degree d)90degree

storchak [24]

Answer:

∠ PTQ = 70°

Step-by-step explanation:

The angles subtended by the radii and tangents to the circle , sum to 180°

∠ PTQ + 110° = 180° ( subtract 110° from both sides )

∠ PTQ = 70°

7 0

2 years ago