如图,eqId19a4eb16029e4550a14f2afe4741a3c3eqIdc12aac8c2448479687a40735b3572a23轴正半轴上一动点,eqId17e4b26bb6234efdae66640ac386ccddeqId843d9ab1278e47608c0c7c864153c45a,且eqId70a27b6ddf6b478285353abb3b1f3741eqIdaea992e70d4943e49e893817eb885ed7满足eqIda556ccde1ead45d9947b592512944211eqIde43b63ebeec741199039c4ca5834927b.
figure
(1)求eqIdb457f7d31e13466aa25edb4234fce91e的面积;
(2)若eqId9761bf2a5868422bac57704436a4b224eqId92869ac114124367b45f631d030ed6bdeqId517584fed25c413ba8b7bb33ffa2d5c6为线段eqId0627be51821d4be7b3e024a354815d64上的动点,作eqId8045464cedda4315baddc3904790d3b4eqIdcf2da96900c948a1b3ce7cbfd420c080eqIdd5b10b2a13f148b78e0d5a1b820538fdFP平分∠GFCFN平分∠AFPx轴于N,记∠FNB=eqIdc13953f2514e4c8f9c8aaaf5241c33ac,求∠BAC(用eqIdc13953f2514e4c8f9c8aaaf5241c33ac表示);
(3)若eqId31b492d6b94a46118ff62646c061e3f0eqIdd619cb2c31f340b9a948a21c13fe4629轴于eqId19a4eb16029e4550a14f2afe4741a3c3,点eqId2381423d4cd146cab95f55527681a766eqIdd7be5abad1e34f6db17a56660de8d54f点出发,在射线eqId6f782d71f5a7422aa78bd8204949ce26上运动,同时另一动点eqId517584fed25c413ba8b7bb33ffa2d5c6从点eqId8754ce8cf7f34f04abb9a0c041f57f5ceqIdcc614bd3390c4d028df189b234dcc351点运动,到eqIdcc614bd3390c4d028df189b234dcc351停止运动,eqId2381423d4cd146cab95f55527681a766eqId517584fed25c413ba8b7bb33ffa2d5c6的速度分别为2个单位/秒、3个单位/秒,当eqId38e9c614886d4502baff11bec16d1edf时,求运动的时间.
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