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sin[squared]60 is the same as (sin 60)^2 or (sin 60)*(sin 60)

If you dont know the sines and cosines of a 30-60-90 triangle off the top of your head, you can enter into a calculator to find out.

sin 60 = 3^(1/2)/2 OR "The square root of three divided by two"
cos 30 = 3^(1/2)/2 OR " ' ' ' ' ' ' ' ' "

So we end up with:

[ 3^(1/2) / 2 ]^2 + [ 3^(1/2) / 2 ]^2
Since it's the same thing twice, we can say:
2 * [ 3^(1/2) / 2 ]^2
Squaring...
2 * [ 3^(1/2) / 2 ] * [ 3^(1/2) / 2 ]
2 * [ 3 / 4]
[ 6 / 4 ] = 1.5

chandan
urs...........

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Q: How to Find sin squared at 30 degrees?
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