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Lubov Fominskaja [6]
2 years ago
13

Prove :.........

3D%20%20%5Cfrac%7Bsinx%7D%7B1%20-%20cosx%7D%20" id="TexFormula1" title=" \sqrt{ \frac{1 + cosx}{1 - cosx} } = \frac{sinx}{1 - cosx} " alt=" \sqrt{ \frac{1 + cosx}{1 - cosx} } = \frac{sinx}{1 - cosx} " align="absmiddle" class="latex-formula">
​
Mathematics
1 answer:
krok68 [10]2 years ago
6 0

This is generally not true. Let x = 3π/2. Then

cos(3π/2) = 0

sin(3π/2) = -1

and

√((1 + cos(x)) / (1 - cos(x))) = √(1 / 1) = 1

while

sin(x) / (1 - cos(x)) = -1 / 1 = -1

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Daniel [21]
X= 43.23+12.50=55.75
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Find the domain of the function:<br><br> V(X)= the square root of 9+X
stellarik [79]

Answer:

[-9,∞)

Step-by-step explanation:


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After being discounted 40%, a weather radio sells for $35.97. find the original price. (round your answer to the nearest cent.)
tia_tia [17]

It is given in the question that

After being discounted 40%, a weather radio sells for $35.97.

It means the weather radio sells at a 60% of original price.

Let the original price be $x.

Therefore according to the question,

60% \ of \ x = 35.97&#10;\\&#10;0.6x = 35.97&#10;\\&#10;x = $59.95

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Find m Just trying to get my credit
kogti [31]

Answer:

130

Step-by-step explanation:

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8 0
3 years ago
Read 2 more answers
If BC= 48 cm and sin
erastovalidia [21]

Using relations in a right triangle, it is found that the length of AC is of 14 cm.

<h3>What are the relations in a right triangle?</h3>

The relations in a right triangle are given as follows:

  • The sine of an angle is given by the length of the opposite side to the angle divided by the length of the hypotenuse.
  • The cosine of an angle is given by the length of the adjacent side to the angle divided by the length of the hypotenuse.
  • The tangent of an angle is given by the length of the opposite side to the angle divided by the length of the adjacent side to the angle.

Researching this problem on the internet, we have that:

  • The opposite leg to angle A is of 48 cm.
  • sin(A) = 0.96.

Hence the hypotenuse is found as follows:

sin(A) = 48/h

0.96 = 48/h

h = 48/0.96

h = 50 cm.

The length of side AC is the other leg of the triangle, found using the Pythagorean Theorem, hence:

x^2 + 48^2 = 50^2

x^2 = \sqrt{50^2 - 48^2}

x = 14 cm.

More can be learned about relations in a right triangle at brainly.com/question/26396675

#SPJ1

6 0
2 years ago
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