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2 years ago

15

Using the identity sine + cos²0 = 1, find the value of tan 8, to the nearest hundredth, if cos 0 is -0.7 and 8 is in Quadrant II

.

1 answer:

IRISSAK [1]2 years ago

7 0

Answer:

-1.01

Step-by-step explanation:

cos^2 + sin^2 = 1

0.49 + sin^2 = 1

sin^2 = 0.51

sin = 0.71

tan = sin/cos = 0.71/-0.7 = -1.01

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Simplify the expression <img src="https://tex.z-dn.net/?f=%5Cfrac%7B-5%2Bi%7D%7B2i%7D" id="TexFormula1" title="\frac{-5+i}{2i}"

Fudgin [204]

Answer:

1/2 + 5/2 i

Step-by-step explanation:

(-5+i) i

---------* --------

2i i

cannot have i in the denominator so we multiply by i

(-5+i) i -5i + i^2

---------* -------- = ----------------

2i i +2i^2

remember i^2 = -1

-5i + -1 -1 -5i

= ---------------- = ------------------

+2(-1) -2

get rid of the negative in the denominator by multiplying the top and bottom by -1

(-1 -5i) * -1

= ------------------

-2*(-1)

(1 +5i)

= ------------------ = 1/2 + 5/2 i

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6 0

3 years ago

WILL GIVE BRANLIEST JUST SOLVE FOR X IN 4X+7

Nostrana [21]

Answer:

-7/4

Step-by-step explanation:

7 0

3 years ago

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Help please<br> I’m trying to find value of x and y. i need to write out the problem

Zanzabum

The answer is x=4.5 and y=1 they are dilated by multiplying 3

8 0

2 years ago

Which points are on the graph of g(x) = (1/5)^x

11111nata11111 [884]

Answer:

A) The point( -1 , 5) is satisfies the given graph $g(x) = (\frac{1}{5} )^{x}$

B) The point( 3 , 1/125) is satisfies the given graph $g(x) = (\frac{1}{5} )^{x}$

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given graph

y = $g(x) = (\frac{1}{5} )^{x}$

Put the point ( -1 , 5)

Put y =5 and x =-1

$5 = (\frac{1}{5} )^{-1} = 5$

The point( -1 , 5) is satisfies the given graph

ii)

Given graph

y = $g(x) = (\frac{1}{5} )^{x}$

$\frac{1}{125} = (\frac{1}{5} )^{3} = \frac{1}{125}$

The point( 3 , 1/125) is satisfies the given graph $g(x) = (\frac{1}{5} )^{x}$

7 0

3 years ago

(4w-3)^2<br> what would be the answer to that?? please explain, i’m so confused.

yarga [219]

Answer:

16w^2 - 24w + 9

Step-by-step explanation:

To simplify this, you would use the special product (a - b)^2 = a^2 - 2ab + b^2. We can correlate this with the given term so that,

a = 4w

and

b = 3

Now we just substitute into a^2 - 2ab + b^2

(4w)^2 - 2(4w)(3) + (3)^2

16w^2 - 24w + 9

7 0

3 years ago

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