Sin 3pi/4 is angle 135 degrees or 45 degrees below 180 degrees. Hence it's opposite side is 1 and adjacent is 1, implying the hypothenus is sqrt(2). Hence
Sin 3pi/4 = 1/sqrt(2). Now multiply by sqrt(2)/sqrt(2) to get:
[1/sqrt(2).] * [sqrt(2)/sqrt(2)] = sqrt2)/2
I think your supposed to add them all together or divide
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a )


Two solutions.
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b )


One solution .
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c )


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d )


One solution.
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e )



Two solutions.
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f )


Two solutions .
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If you look on jiskha you will find the answer you will be looking for just type it in B
13
The product of 2 numbers is when you multiply them together. 12x2=24
The quotient of 2 numbers is when you divide them. 45/5=9
24-9=13