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Q.

If tanx+tan2x+tan3x=tanxtan2xtan3x , then value of |sin3x+cos3x| is

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answer is 1.

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Detailed Solution

Given ,tanx+tan2x+tan3x=tanxtan2xtan3x

tanx+tan2x=tanxtan2xtan3xtan3x

tanx+tan2x=tan3x(1tanxtan2x)

tanx+tan2x1tanxtan2x=tan3x

tan3x=tan3x

2tan3x=0

3x=0

x=0°

|sin3x+cos3x|

=|sin0°+cos0°|

=1

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