**What is the exact value of cos 15? Study.com**

Jason Student Grade 11 How do you find the exact solution to cosine 35 degrees. Hi Jason, The exact value of cos (35 deg) cannot be written down "exactly," although you can compute it to as many decimal places as you wish.... Question: Find the exact value of cos(15°) by using a sum or difference formula.

**Use an addition or subtraction formula to find the exact**

4pts Use a half angle formula to find the exact value of cos15 q Math 160 Exam from MATH 160 at Mt. San Antonio College... Find the exact value of cot-1(1). Get the answers you need, now!

**What is the exact value of cos 15? Study.com**

Question: Find the exact value of cos(15°) by using a sum or difference formula. how to live life as a hermit Find the exact value of cos pi/12 using half angle identity. simplify,including any radicals. Use integers or fractions for any numbers in the expression.Rationalize all denominators. Use integers or fractions for any numbers in the expression.Rationalize all denominators.

**find the exact value of cos 15 degrees. jiskha.com**

First we find the sin 3 ° by using the sines and cosines of 15 ° and 18 ° and the composite argument formula. Then we derive the formula for sin 3 x =3sin x -4sin 3 x by repeated applications of the composite argument formula. earth911 com find where and how to recycle Find the exact value of cot-1(1). Get the answers you need, now!

## How long can it take?

### Find Exact Value of Cos15 Q2 YouTube

- What is the exact value of cos 15? Study.com
- Use sum and difference identities to find the exact value
- 1. Which is a solution to the equation below? sin2xsecx=1
- 1. Which is a solution to the equation below? sin2xsecx=1

## How To Find Exact Value Of Cos15

Find the exact value of cos 15 degrees= sqrt(A)(sqrt(B)+1)/4...what is A and what is B? I know how to get the answer, but for some reason, they want it in this format and I'm not sure how to do it this way.

- color(red)(cos15 = sqrt(2 +sqrt3)/2) > The cosine half-angle formula is cos(x/2) = ħsqrt((1 + cos x) / 2) The sign is positive if x/2 is in the first or fourth quadrant and negative if x/2 is in the second or third quadrant. 15° is in the first quadrant, so the sign is positive. 15= 30/2 ? cos15 = cos(30/2) = sqrt((1+cos30)/2) cos15 = sqrt
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- Get an answer for 'Which is the value of the sum cos 75 + cos 15?' and find homework help for other Math questions at eNotes
- 12/01/2016 · The half angle formula for Cosine is helpful when you need to determine the exact value of function given an angle but cannot use a calculator or the angle is not on the unit circle. To evaluate