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scZoUnD [109]
3 years ago
7

Find an exact value cos 75°

Mathematics
2 answers:
Drupady [299]3 years ago
5 0

Answer:

0.2588

Step-by-step explanation:

Vikentia [17]3 years ago
4 0

Answer:

(√3 - 1) / 2√2.

Step-by-step explanation:

Using the compound angle identity

cos(A + B) = cosA cosB - sinA sinB:-

cos 75

= cos (45 + 30)

= cos 45 cos 30 - sin 45 sin 30

= 1 / √2 * √3/2 - 1 / √2 *  1 / 2

= √3 / 2√2 - 1 / 2√2

= (√3 - 1) / 2√2.

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balandron [24]

Answer:

The Quotient Property.

Step-by-step explanation:

Since all three logarithms have the same base (base-5), and you are subtracting 6 and 3, to solve this all you need to do is 6 / 3 because of the Quotient Property.

You aren't multiplying anything, so you wouldn't use the Product Property.

You are not messing around with powers, so you wouldn't use the Power Property.

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Hope this helps!

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An oil spill spreads 25 square meters every 1/6 hour how much area does the oil spill cover after 2 hours
mrs_skeptik [129]
I believe that you do 25 times 1/6 and then when you get the answer you multiply the answer by 2
3 0
4 years ago
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galben [10]

Answer:

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f(j) = 6(1/3) + 5

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  1. replace j by 1/3
  2. distribute 6(1/3)
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4 0
3 years ago
What is the slope of the line plotted below?<br> O A. 0.25<br> B. -0.25<br> O C. -0.5<br> O D. 5
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Answer:

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WITCHER [35]

Answer:

Step-by-step explanation:

The angles between the parallel sides add up to 180 degrees.

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