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已知四棱锥\(S{-}{ABCD}\)的底面是正方形,侧棱长均相等,\(E\)是线段\(AB\)上的点\((\)不含端点\(){.}\)设\(SE\)与\(BC\)所成的角为\(\theta_{1}\),\(SE\)与平面\(ABCD\)所成的角为\(\theta_{2}\),二面角\(S{-}{AB}{-}C\)的平面角为\(\theta_{3}\),则\((\) \()\)

已知四棱锥\(S{-}{ABCD}\)的底面是正方形,侧棱长均相等,\(E\)是线段\(AB\)上的点\((\)不含端点\(){.}\)设\(SE\)与\(BC\)所成的角为\(\theta_{1}\),\(SE\)与平面\(ABCD\)所成的角为\(\theta_{2}\),二面角\(S{-}{AB}{-}C\)的平面角为\(\theta_{3}\),则\((\)    \()\)

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