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zlopas [31]
2 years ago
11

Calculate the exact value of cos(a−b) given that sin a=12/13 with π/2

Mathematics
1 answer:
Lady bird [3.3K]2 years ago
8 0

Answer:

Step-by-step explanation:

sin ~a=\frac{12}{13} ,\frac{\pi}{2}

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4...    hope this will help

Step-by-step explanation:

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3 years ago
If the outliers are not included, what is the mean of the data set?
ioda
If you don't include the outlier (50) then it is 79.7
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Verify sin4 x- sin2x = cos4x – cos2x is an identity
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Step-by-step explanation:

sin⁴ x − sin² x

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Pythagorean identity:

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6 0
3 years ago
Casey wants to buy a gym membership. One gym has a $70 joining fee and cost $35 per month. Another Jim has no joining fee and co
irga5000 [103]

Answer:

same amount at 2 months. he'd pay 140.

Step-by-step explanation:

35(month) +35(month) =70(joining fee). 70+70=140. that's two months at the first gym.

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6 0
3 years ago
A circle with radius of 5 cm sits inside a 11 cm * 11 cm rectangle.
Nadusha1986 [10]

Answer:

42.43  cm^{2}

Step-by-step explanation:

Given:

A circle with a radius of 5 cm sits inside a 11 cm x 11 cm rectangle.

Question asked:

What is the area of the shaded region as shown in the figure ?

Solution:

First of all calculate area of circle and then area of rectangle:-

Area\ of\  cirle=\pi r^{2}

                      =\frac{22}{7} \times5\times5\\ \\ =\frac{550}{7}\\  \\=78.571\   cm^{2}\\

<u>As here length an width both are 11 cm, we can say that this is a square.</u>

<u />Area\ of\ square=(Side)^{2}

                         =11\times11=121\ cm^{2}

Now, area of shaded region = Area of square - Area of circle

                                               = 121 - 78.571 = 42.429 cm^{2}

Therefore, the area of the shaded region will be 42.43  cm^{2}

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5 0
3 years ago
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