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Annette [7]
2 years ago
6

Cos90degrees cos30 degrees + sec-squared45degrees sin30degrees - cos270degrees sin180degrees

Mathematics
1 answer:
yawa3891 [41]2 years ago
6 0

Step-by-step explanation:

\cos 90 \cos 30 + \sec^2 45 \sin 30 - \cos 270 \sin 180

But we know that

\cos 90 = \cos 270 = \sin 180 = 0

and

\sin 30 = \dfrac{\sqrt{3}}{2} \:\:\text{and}\:\: \sec 45 = \sqrt{2}

so this leaves us with just

\sec^2 45 \sin 30 = (\sqrt{2})^2  \left(\dfrac{\sqrt{3}}{2} \right)= \sqrt{3}

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How many times greater is 7 x 10^6 than 4.5 x 10^-1
kipiarov [429]

Let us assume that : 7 × 10⁶ is P times Greater than 4.5 × 10⁻¹

It means when we Multiply P with 4.5 × 10⁻¹, We should get 7 × 10⁶

⇒ (P × 4.5 × 10⁻¹) = 7 × 10⁶

\mathsf{\implies P = (\dfrac{7 \times 10^6}{4.5 \times 10^-^1})}

\mathsf{\implies P = 1.56 \times 10^7}

⇒ 7 × 10⁶ is 1.56 × 10⁷ times Greater than 4.5 × 10⁻¹

4 0
2 years ago
Christine basked a pie.she ate one sixth of the pie. Her brother ate one third of the pie and gave the leftovers to his friends
Sergeeva-Olga [200]

Answer:

Her brother gave his friends one half the pie.

Step-by-step explanation:

The whole pie is equal to 6/6, because that's equal to one. 1/3 = 1/6. 6/6 - 2/6 = 5/6. 5/6 - 2/6 = 3/6. 3/6 = 1/2.

8 0
3 years ago
Convert 17⁄8 to a decimal, rounded to the nearest hundredth. A. 2.13 B. 2.44 C. 1.78 D. 1.14
11111nata11111 [884]
Hey there! :)

All you have to do is divide the numerator(top number) by the denominator(bottom number).

17 ÷ 8 = 2.125

Rounded to the nearest hundredth = 2 places after the decimal point.

After the 2 is a 5. If it's 5 or greater, you move it up by 1.

2 + 1 = 3

2.125 = 2.13

Your answer is A ⇒ 2.13

Hope this helps :)


3 0
3 years ago
On a graph which line is horizontal and vertical? y or x
Dvinal [7]

Answer:

The Y is the vertical line and X is the horizontal line on the graph. So if you have point so (5,4). Five would be on the X-axis and 4 on Y-axis.

Step-by-step explanation:

4 0
2 years ago
Enter a fraction that is equivalent to 1/5 with a numerator of 8.
photoshop1234 [79]

Answer:

lol imagine

Step-by-step explanation:

3 0
3 years ago
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