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Question

If sin17=xy, then the value of sec17sin73 will be


A

y2xy2x2

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B

x2yy2x2

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C

x2yx2y2

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D

y2xx2y2

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Solution

The correct option is B

x2yy2x2


We know 73+17=90

sec 17=yy2x2

sin 73=y2x2y

sec 17sin 73 =yy2x2y2x2y=y2(y2x2)yy2x2=y2y2+x2yy2x2=x2yy2x2


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