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Mazyrski [523]
3 years ago
10

Sin 2A + sin A/1+cos A + cos 2A=tan A

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
7 0

Answer:

= 2sinA.cosA+ sinA / 1+cos2A+ cosA

= sinA(2cosA + 1) / 2cos^2A + cosA

= sinA(2cosA + 1) / cosA( 2cosA + 1)

= sinA / cosA

= tan A

= R.H.S

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What's the scientific notation of 0.000000109
Over [174]
0.000000109 in scientific notation will look as it follows:

1.09 * 10^-7

or
<span>
1.09 E-7

It's the same as 1.09 * (-10000000)

I hope it'll give you some clue of scientific notation with decimals.</span>
5 0
3 years ago
The graph represents this system of equations.
bonufazy [111]

Answer:

The answer to your question is (1, -2)

Step-by-step explanation:

See the graph below, in the graph, the solution is circled (1, -2). The solution is the point where the lines cross.

To check the answer, let's solve the system using algebra.

                                    y = 2x - 4

                                    y = 1 - 3x

                                  2x - 4 = 1 - 3x

                                  2x + 3x = 1 + 4

                                          5x = 5

                                            x = 5/5

                                            x = 1

Find y by substitution

                                   y = 2(1) - 4

                                   y = 2 - 4

                                   y = -2

Solution

                                    (1, -2)            

5 0
3 years ago
What statistical test and how many of them will need to be used to explore the difference in average cholesterol within each gro
zepelin [54]

Answer:

The statistical test to be used is the paired t-test.

Step-by-step explanation:

The dependent t-test (also known as the paired t-test or paired-samples t-test) compares the two means associated groups to conclude if there is a statistically significant difference between these two means.

We use the paired t-test if we have two measurements on the same item, person or thing. We should also use this test if we have two items that are being measured with a unique condition.

For instance, an experimenter tests the effect of a medicine on a group of patients before and after giving the doses.

Similarly, in this case a paired t-test would be used to deter whether there was any changes in the cholesterol level within each group as result of the treatment.

Thus, the statistical test to be used is the paired t-test.

6 0
3 years ago
How do I go about solving this problem??​
4vir4ik [10]

Answer:

I believe that it is 149 bushels per acre.

Step-by-step explanation:

I hope this right sorry if this is wrong

8 0
3 years ago
The blood pressure in millimeters was measured for a large sample of people. The average pressure is 140 mm, and the sd of the m
Bess [88]
B is the answer i believe
6 0
2 years ago
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