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3 years ago

Find the equation of the line Y= x +

Mathematics

1 answer:

SpyIntel [72]3 years ago

5 0

Answer:

Step-by-step explanation:

(0, -9) and (3,3)

(3+9)/(3-0) = 12/3 = 4

y + 9 = 4(x - 0)

y + 9 = 4x - 0

y = 4x - 9

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Svetach [21]

Answer:

Step-by-step explanation:

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3 years ago

If sin(θ -π/2) = 0.73.. find cos (-θ) plz explain how to solve

Temka [501]

Answer:

$cos(-\theta) = -0.73$

Step-by-step explanation:

It is given that:

$sin(\theta -\dfrac{\pi}{2}) = 0.73$

<u>Formula to be used:</u>

$1.\ sin(-x) = -sinx\\2.\ sin(\dfrac{\pi}{2}-x) = cosx\\3.\ cos(-x) = cosx$

Using Formula (1) written above:

$\Rightarrow sin (\theta - \dfrac{\pi}{2})=sin(-(\dfrac{\pi}{2}-\theta ))\\\Rightarrow -sin(\dfrac{\pi}{2}-\theta)$

Now, using Formula (2) written above:

$\Rightarrow -sin(\dfrac{\pi}{2}-\theta) = -cos \theta$

So, we can say that:

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We have to find the value of $cos(-\theta)$ .

Using Formula (3) written above:

$cos(-\theta) = cos\theta$

So, ultimately we need to find the value of $cos\theta$

Using equation (1):

$-cos\theta = 0.73\\\Rightarrow cos\theta = -0.73$

So, the answer is $cos(-\theta) = -0.73$ .

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3 years ago

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Find the equation of the line Y= __x + __

Find the equation of the line Y= x +