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\[\sqrt{1-(.50)^2}\]

be careful when entering it

use brackets

i did
and the answer in my math book is .87

first do 1-.5^2
then take the sqrt of the answer i tried it

like lalaly said, you have to do the stuff under the sqrt first...

In addition and subtraction \[\sqrt{1-0.5^2} \cancel{=} \sqrt{1}-\sqrt{0.5^2}\]

the sqrt of .5 is not .87 its .7 so what is going on

its ok... goodluck

You're not a moron. Everyone forgets stuff. That's why we're here to help. :)

thanks guys
p.s i hate trig lol