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| 1. |
\begin{array}{l}{118 \text { . The value of }} \\ {\sin ^{2} 1^{\circ}+\sin ^{2} 3^{\circ}+\sin ^{2} 5^{\circ}+\ldots+\sin ^{2} 87^{\circ}+\sin ^{2} 89} \\ {\text { is }}\end{array} |
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