If (cos(theta(1)-theta(2)))/(cos(theta(1...

If `(cos(theta_(1)-theta_(2)))/(cos(theta_(1)+theta_(2)))+(cos(theta_(3)+theta_(4)))/(cos(theta_(3)-theta_(4)))=0,` then `tantheta_(1)tan theta_(2)tan theta_(3)tan theta_(4)=`

`-1`

none of these

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(cos(theta_(1)-theta_(2)))/(cos(theta_(1)+theta_(2)))+(cos(theta_(3)+theta_(4)))/(cos(theta_(3)-theta_(4)))=0then(tan theta_(1)*tan theta_(2))/(cot theta_(2)*cot theta_(4))

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