6.3.48
The problem asks to simplify (sin t - cos t)^2 and I don't understand how you would simplify that, if sin = y/r and cos = x/r?
posted by Elena at 9:59 PM
Sunday, January 28, 2007
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1 Comments:
First I expanded it to sin^2(t)- 2cos(t)*sin(t)+cos^2(t) because addition is communitive we can rearrange it too sin^2(t)+cos^2(t)which according to the trig identities is equal to 1 so the final statement I got was 1-2*sin(t)*cos(t)
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