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IRINA_888 [86]
3 years ago
15

If tan a=1/7 and tan b=1/3, prove that cos 2a =sin 4b

Mathematics
1 answer:
koban [17]3 years ago
4 0
Solve is in the pic.

With Geometry..



GoodLuck:)

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Plzzzz help me with one and two I don’t understand
Ratling [72]
What this question simply asks about is you write the numbers it gave you in only one digit by 10 to the power of n. Where n represents the number of shifts of the decimal point.
And to get this number to be one digit, then you have to approximate.
To approximate; you should always consider that less than 5 counts zero and 5 or more counts+1.
Example:
5.3 is approximately 5
5.5 is approx. 6
5.9 is also approx. 6
and so on.
So the final answers are;
1) 4*10^13
2) 5*10^-11
Please note that 10^positive integer will cause the decimal point to move to the right which means a number greater than 1, usually, while 10^negative integer means number smaller than 1, usually.
Hope this helps.
7 0
3 years ago
6h+(-7.3d)-13+5d-2.6h=? PLEASE HELP ASAP​
Strike441 [17]

Answer:

-2.3d+3.4h-13

Step-by-step explanation:

4 0
3 years ago
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Please solve all 3<br><br> I need this quick
AnnyKZ [126]

Answer: i have absolutely no idea

Step-by-step explanation:

5 0
3 years ago
190% of what number is 76<br> Plz hurry I really want to get this done
pishuonlain [190]

Answer:

190 is 76% of 250

Step-by-step explanation:

We have, 76% × x = 190

Multiplying both sides by 100 and dividing both sides by 76,

we have x = 190 × 100/76

x = 250

If you are using a calculator, simply enter 190×100÷76, which will give you the answer.

7 0
3 years ago
Consider the following data set:
Komok [63]

Answer:

+5 Range; The range is now 25

Step-by-step explanation:

The original range would be calculated by subtracting 20 from 40, giving you 20 as the range. However, with the point 15 added, there would be a new lowest number, making the new range be 40-15, which is 25.

3 0
3 years ago
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