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

If cos θ = c, then sinĀ²θ/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.

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