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mina [271]
3 years ago
5

Prove this identify : 2 cos^2 (45°-A ) = 1 +sin 2 A​

Mathematics
1 answer:
Bas_tet [7]3 years ago
7 0
I am guessing that you mean 2cos2(45° - x) = 1 + sin2x

According to a double angle identity, 2cos2θ - 1 = cos(2θ)

So, 2cos2(45° - x) - 1 = cos (90° - 2x)

= cos90°cos2x + sin90°sin2x

= (0)cos2x + (1)sin2x

= sin2x

Thus, 2cos2(45° - x) = 1 + sin2x
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Paula's house is assessed at $213,000, and her property tax rate is 2.9%. How
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Answer:A

Step-by-step explanation:

She is taxed at a rate of 2.9%, so each year she is taxed 213000 * 2.9% . calculating this, we find that every year, she must pay 6177 in taxes. However, we need the amount in a month, so we divide by 12, to get 6177/12= 514.75, or A

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3 years ago
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Subtract 3x^2+8x3x <br> 2<br> +8x from -9x^2+3x-8−9x <br> 2<br> +3x−8
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4 years ago
Triangle MRN is created when an equilateral triangle is folded in half.
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The value of y based on the values given ib the equilateral triangle will be 4.

<h3>How to illustrate the triangle?</h3>

From the information given, MN is one of the sides of the equilateral triangle. Therefore, side MR will be:

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Here, value of y based on the values given ib the equilateral triangle will be 4.

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6 0
2 years ago
What does how many mean?
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Divided by its a key word for example: Sally has 100 cookies she shares them with 9 friends how many cookies does each person get? including sly there are 10 people. so, it would be 100÷10 which is 10

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4 years ago
Boris is ordering supplies for his company. He ordered 20 boxes of pencils and 32 boxes of pens. What is the ratio of boxes of p
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