Posted by **Moe** on Saturday, April 27, 2013 at 9:56pm.

If cos θ = c, then sin˛θ/2 equals

1) 1-c/2

2) 1+c/2

3) 1-c/c+c

4) 1-c/4

- Algebra 2/ Trigonometry -
**Damon**, Saturday, April 27, 2013 at 10:51pm
cos^2 = c I suspect typo

1 - sin^2 = c

sin^2 = 1 - c

sin^2 /2 = (1-c)/2 not 1 - c/2

I am not a mind reader. Please check what you type to make sure it makes sense.

- Algebra 2/ Trigonometry -
**Moe**, Sunday, April 28, 2013 at 11:50am
I typed what i wrote correctly these questions are from a work sheet therefore your smart comments aren't needed if you simply can not solve it, just don't post.

## Answer this Question

## Related Questions

- Math - Calculus - The identity below is significant because it relates 3 ...
- Algebra 2/ Trigonometry - The expression oos˛ θ/sin θ + sin θ is ...
- Trigonometry - Which of the following is equivalent to 1 − cos 2 θ/...
- trigonometry - if cosθ=2/3 and tanθ<0 find the exact value sin(&#...
- Trigonometry - Hi. I am reposting this. Can you verify. Thanks. (cosθ) / (...
- Trigonometry - There are four complex fourth roots to the number 4−4√...
- Math - θ equals the angle in Quadrant II so that cot θ= -3. Find the ...
- Trigonometry - Could someone please help me with the following q's I'm having ...
- Trigonometry - 1.Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two ...
- Trigonometry - Find the remaining trigonometric ratios of θ if sin(θ) ...