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How do you use sum and difference identities to find the exact value of sin75?
Wiki User
∙ 13y ago
trun it into sin( 45 + 30 ).
sin ( 45 + 30 ) = sin30cos45 + cos30sin45
sin30cos45 + cos30sin45 = (1/2)((sqrroot2)/2) + ((sqrroot3)/2)((sqrroot2)/2)
(1/2)((sqrroot2)/2) +((sqrroot3)/2)((sqrroot2)/2)=((sqrroot2)/4) + ((sqrroot6)/4)
((sqrroot2)/4) + ((sqrroot6)/4)= ((sqrroot2) + (sqrroot6)) /4
Wiki User
∙ 13y ago
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How can the exact value of sin75 be found using sina plus b equals sinacosb plus cosasinb?
sin75 = sin(45 + 30) = sin45cos30 + cos45sin30 = (1/root 2)((root 3)/2) + (1/root 2)(1/2)
What is exact value of sin75?
sin(75) = sin(45 + 30) = sin(45)*cos(30) + cos(45)*sin(30) = [1/sqrt(2)]*[sqrt(3)/2] + [1/sqrt(2)]*[1/2] = 1/[2*sqrt(2)]*[sqrt(3) + 1] that is [sqrt(3) + 1] / [2*sqrt(2)]
What does the approximate value mean in math?
Approximate value, is a value that is not necessarily the right answer but, it is the closest one to it.It means that it isn't exact - but close to the exact value.
How do you divide by exact value and make it a percent?
Some value / exact value x 100 = percentage
Could you find the circumference of a circle using the exact value for pi?
Yes, you could if you knew the exact value for pi as well as the diameter of the circle. Multiply the diameter by the exact value for pi to get the circumference. However, it is impossible because the exact value for pi is not known. It is only known to about a trillion decimal places, but the exact value is not known.
How can the exact value of sin75 be found using sina plus b equals sinacosb plus cosasinb?
sin75 = sin(45 + 30) = sin45cos30 + cos45sin30 = (1/root 2)((root 3)/2) + (1/root 2)(1/2)
Identities to find the exact value of sin 75?
what is the value of sin 75 degree
What expressions that have the same value are called?
They are identities.
What is exact value of sin75?
sin(75) = sin(45 + 30) = sin(45)*cos(30) + cos(45)*sin(30) = [1/sqrt(2)]*[sqrt(3)/2] + [1/sqrt(2)]*[1/2] = 1/[2*sqrt(2)]*[sqrt(3) + 1] that is [sqrt(3) + 1] / [2*sqrt(2)]
What part of the Windows Registry contains the user's password file?
HKEY_CURRENT_USER\Identities\{VALUE}
What is it that you can't ever calculate?
-- end of the universe -- the day you will die -- the exact value of 'pi' -- the exact value of ' e ' -- the exact value of sqrt(2) -- the exact value of any other irrational number
What does the approximate value mean in math?
Approximate value, is a value that is not necessarily the right answer but, it is the closest one to it.It means that it isn't exact - but close to the exact value.
What is the exact value or sin 22.5?
The exact value of sin 22.5 is 0.382683432
Why not is there an exact value of pie?
There is an exact value - we just can't write it in numbers.
When two expressions are equal in value?
They are callled: Identical equations or Identities See: http://www.tutorvista.com/search/value-algebraic-expressions
How do you divide by exact value and make it a percent?
Some value / exact value x 100 = percentage
What does trigonometric identities all about?
They are true statements about trigonometric ratios and their relationships irrespective of the value of the angle.
