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Vinil7 [7]
3 years ago
8

Please help with this question

Mathematics
1 answer:
Klio2033 [76]3 years ago
7 0

Answer:

cos(x=pi/4)= \frac{17}{26}*\sqrt{2}

Step-by-step explanation:

Remember that sin^{2}(x) +cos^{2}(x)=1

We need to find cos(x) from the above equation.

cos(x)= 12) / 13. This solution is positive since cos(x) in the range (2pi/3, 2pi) is positive.

Now, to obtain cos(x+pi/4) lets use the relation for cos(a+b)= cos(a)*cos(b)-sin(a)*sin(b)

where a=x, b =pi/4

Hence

cos(x+pi/4) =cos(x)*cos(pi/4) - sin(x)*sin(pi/4)

cos(x+pi/4) = \frac{\sqrt{2}}{2} * (cos(x)+5/13)

cos(x=pi/4)=\frac{\sqrt{2} }{2} *(\frac{12}{13}+\frac{5}{13})=\frac{17}{26} \sqrt{2}

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A. ( x + 5)<br><br>B. ( x - 5 )<br><br>C. ( x + 3 )<br><br>D. ( x - 3 )
Blababa [14]

Answer:

(x + 5) B. (x - 5) C. (x + 3) D. (x - 3) = = 0

Step-by-step explanation:

The calculator performs basic and advanced operations with fractions, expressions with fractions combined with integers, decimals, and mixed numbers. It also shows detailed step-by-step information about the fraction calculation procedure. Solve problems with two, three, or more fractions and numbers in one expression.

Rules for expressions with fractions:

Fractions - use the slash “/” between the numerator and denominator, i.e., for five-hundredths, enter 5/100. If you are using mixed numbers, be sure to leave a single space between the whole and fraction part.

The slash separates the numerator (number above a fraction line) and denominator (number below).

Mixed numerals (mixed fractions or mixed numbers) write as non-zero integer separated by one space and fraction i.e., 1 2/3 (having the same sign). An example of a negative mixed fraction: -5 1/2.

Because slash is both signs for fraction line and division, we recommended use colon (:) as the operator of division fractions i.e., 1/2 : 3.

Decimals (decimal numbers) enter with a decimal point . and they are automatically converted to fractions - i.e. 1.45.

The colon : and slash / is the symbol of division. Can be used to divide mixed numbers 1 2/3 : 4 3/8 or can be used for write complex fractions i.e. 1/2 : 1/3.

An asterisk * or × is the symbol for multiplication.

Plus + is addition, minus sign - is subtraction and ()[] is mathematical parentheses.

The exponentiation/power symbol is ^ - for example: (7/8-4/5)^2 = (7/8-4/5)2

6 0
2 years ago
Sam raked 3 bags of leaves in 16 minutes. If he continues at the same rate, how many minutes will it take him to rake 9 bags?
zmey [24]

Answer:

48 minutes.

Step-by-step explanation:

9 divided by 3 equals 3, 16 multiplied by 3 equals 48.

8 0
2 years ago
Read 2 more answers
1650 divided by 55 but show work
Taya2010 [7]
          30      The answer is 30. Hope this helps you! 
     --------
50)1650
    -165
     --------
         00
         -0
      -------
         00
8 0
3 years ago
The centroid cuts each median into two segments. The shorter segment is _ _ _ _ the length of the entire segment.
adoni [48]

Answer:

Step-by-step explanation:

One third

3 0
2 years ago
we need to make a number code with 4 digits. how many codes have at least two equal digits? and how many codes have exactly 3 eq
Blizzard [7]

Answer:

First do the case in which none of the digits is 0.

There are 9 ways to choose the digit that repeats 3 times and 8 ways to pick the other, after this there are 4 ways to order the digits. So 9×8×4.

Now we look at the cases in which the digit 0 repeats 3 times. Clearly the 9 numbers are 1000,2000,3000,…,9000.

Lastly we look at the cases in which 0 appears once. There are 9 ways to pick the other digit and 3 ways to order.

So the final answer is 9×8×4+9+9×3.

6 0
3 years ago
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