**SOLUTION Please I need your help to find the exact value**

210 degrees is a third quadrant degree angle that is in between 180 degrees and 270 degrees. So we expect that the cosine of this angle is equal to a negative value.... Well, you have to remember that this is just a 30Â° angle in the second quadrant. And the cos(30Â°) = âˆš3/2. But, since the cosine is negative in this quadrant, we have to take the negative value of this = -âˆš3/2.

**How can the value of cos 15 be found without the use of a**

I know cos60= 1/2 but don't get how to get cos120 in exact form without a calculator It is not difficult. If we leave the sign for the moment, the following angles have the same value. 60, 120, 240, 300....Well, you have to remember that this is just a 30Â° angle in the second quadrant. And the cos(30Â°) = âˆš3/2. But, since the cosine is negative in this quadrant, we have to take the negative value of this = -âˆš3/2.

**How would I find the cosine (150) without using a calculator?**

Well, you have to remember that this is just a 30Â° angle in the second quadrant. And the cos(30Â°) = âˆš3/2. But, since the cosine is negative in this quadrant, we have to take the negative value of this = -âˆš3/2. this war of minef how to fix broken character 19/02/2011Â Â· evaluate the sine, cosine, and tangent of the angle without using a calculator of -220 degrees? Thanks Thus sin(-225) = sin(45) = 1/sqrt(2), cos(-225) = -cos(45) = -1/sqrt(2) and tan(-225) = -tan(45) = -1. For -220 degrees the reference angle is 40 degrees and you cannot write down exact values. You can compute approximate values either using a calculator or by using say Taylor series. â€¦. How to find complaints against assisted living facilities

## How To Find Cos 225 Without Calculator

### How would I find the cosine (150) without using a calculator?

- SOLUTION Please I need your help to find the exact value
- Mathway Find the Exact Value cos(195)
- How can the value of cos 15 be found without the use of a
- How can the value of cos 15 be found without the use of a

## How To Find Cos 225 Without Calculator

### Yes, you can always get a decimal approximation with your calculator, but it's good to learn the logic of using the identities, so you can exercise your skills at pattern-finding and -matching. Evaluate cos â€¦

- find the exact value of the following without using a calculator: (sin^2)(225degrees)-(cos^2)(300degrees) The reference angle for 225 degrees is 45 degrees in the 3rd quadrant
- 21/07/2015Â Â· Calculate the exact values without a calculator of (a) cot 150 degrees (b) cos 225 degrees (c) cos 105 degrees?
- I know cos60= 1/2 but don't get how to get cos120 in exact form without a calculator It is not difficult. If we leave the sign for the moment, the following angles have the same value. 60, 120, 240, 300.
- Well, you have to remember that this is just a 30Â° angle in the second quadrant. And the cos(30Â°) = âˆš3/2. But, since the cosine is negative in this quadrant, we have to take the negative value of this = -âˆš3/2.

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