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14 days before the day of your next period

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16y ago

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Continue Learning about Trigonometry

How many times can a tornado form in one day?

The current record for most tornadoes in a 24 hour period is 208, set on April 27, 2011.


Use a calculator to find tan 27 round to the nearest thousandth?

0.510


What does treble 9 mean in darts?

If a dart lands in the treble nine bed, the score is 9 x 3 = 27


How tan9-tan27-tan63 tan81 equals 4?

tan(9) + tan(81) = sin(9)/cos(9) + sin(81)/cos(81)= {sin(9)*cos(81) + sin(81)*cos(9)} / {cos(9)*cos(81)} = 1/2*{sin(-72) + sin(90)} + 1/2*{sin(72) + sin(90)} / 1/2*{cos(-72) + cos(90)} = 1/2*{sin(-72) + 1 + sin(72) + 1} / 1/2*{cos(-72) + 0} = 2/cos(72) since sin(-72) = -sin(72), and cos(-72) = cos(72) . . . . . (A) Also tan(27) + tan(63) = sin(27)/cos(27) + sin(63)/cos(63) = {sin(27)*cos(63) + sin(63)*cos(27)} / {cos(27)*cos(63)} = 1/2*{sin(-36) + sin(90)} + 1/2*{sin(72) + sin(36)} / 1/2*{cos(-36) + cos(90)} = 1/2*{sin(-36) + 1 + sin(36) + 1} / 1/2*{cos(-36) + 0} = 2/cos(36) since sin(-36) = -sin(36), and cos(-36) = cos(36) . . . . . (B) Therefore, by (A) and (B), tan(9) - tan(27) - tan(63) + tan(81) = tan(9) + tan(81) - tan(27) - tan(63) = 2/cos(72) – 2/cos(36) = 2*{cos(36) – cos(72)} / {cos(72)*cos(36)} = 2*2*sin(54)*sin(18)/{cos(72)*cos(36)} . . . . . . . (C) But cos(72) = sin(90-72) = sin(18) so that sin(18)/cos(72) = 1 and cos(36) = sin(90-36) = sin(54) so that sin(54)/cos(36) = 1 and therefore from C, tan(9) – tan(27) – tan(63) + tan(81) = 2*2*1*1 = 4


How would you explain to someone who has not yet studied trigonometry the difference between an identity and an equation?

An identity is true for all values of the variable whereas an equation is true for only a finite number of values.For example,Identity: (x + 2)3 = x3 + 6x2 + 12x + 27 is true, whatever the value of x.ButEquation: x3 - x = 0 is true only when x = -1, 0 or 1.

Related Questions

When in a 27 day cycle am your fertile?

On 13


Can a 27 day cycle change to a 35 day cycle?

Yes, a 27 day cycle can change to a 35 day cycle. There are several factors that can contribute to a change in your menstrual cycle. Some of these include medication, stress, a change of lifestyle and certain medical conditions.


Is it normal to have a 27 day menstrual cycle when it is normally a 28 day or 30 day cycle?

Oh God! A 30 day cycle? it's only supposed to last a week every month.


Is it normal to have a 27-day menstrual cycle when it is normally a 28-day or 30-day cycle?

The typical menstrual cycle in "text book" terms is considered to be anything between 21 to 32 day cycle. yes that's normal


Can implantation occur the same week you expect your period?

This depends on the length of your cycle. If you have a shorter cycle (less than 27 days) this is possible.


What day of the week did October 27 1949 occur?

Thursday


What happens to the uterine lining between day 27 and day 1 what is this process called?

Between day 27 and day 1 of the menstrual cycle, if pregnancy does not occur, the uterine lining (endometrium) undergoes a process called menstruation. Hormonal changes lead to a decrease in progesterone, causing the blood vessels in the endometrium to constrict and the lining to break down. This results in the shedding of the lining and menstrual bleeding, marking the start of a new cycle.


On which CD did you get your BFP?

I got my BFP on CD 31 of a 27 day cycle.


What happens to the uterine lining between day 27 and day 1 and what is this process called?

Between day 27 and day 1 of the menstrual cycle, if pregnancy does not occur, the uterine lining (endometrium) begins to break down and is shed. This process, called menstruation, involves hormonal changes that lead to the constriction of blood vessels in the lining, causing it to disintegrate and be expelled from the body. This shedding typically lasts for about 3 to 7 days, marking the start of a new menstrual cycle.


If the first day of your last menstrual cycle was Jan 27 and you found out you were pregnant on March 23rd what day did you conceive?

You may have conceived in February or March, depending on the regularity of your menstrual cycle.


Raja bought a cycle two days before his birthday and it broke 3 days after his bdif the day cycle broke was 2nd may 1956 when did he buy the cycle?

27 april 1956


Is your cycle considered normal if it comes different every month Example one month 25 day and next month 27 day?

yes