(1) 3x+10y-25=0,x^2/25+y^2/4=1,
设x=5cosa,y=2sina,
代入得15cosa+20sina-25=0,
即3cosa+4sina-5=0,易得cosa=3/5,sina=4/5,
所以交点为(3,8/5);
(2) x^2-y+2=0,x^2/16+y^2/4=1,
设x=4cosb,y=2sinb,
代入得16cosb^2-2sinb+2=0,
即8cosb^2-sinb+1=0,即9-8sinb^2-sinb=0
易得sinb=1,或sinb=-9/8(舍去),
故交点为(0,2);
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