If sine theta equals one half and pi over two is less than theta is less than pi, what are the values of cos θ and tan θ?
cosine theta equals negative square root of three over two; tangent theta equals negative square root of three over three
cosine theta equals square root of three over two; tangent theta equals square root of three over three
cosine theta equals negative square root of three over two; tangent theta equals square root of three over three
cosine theta equals square root of three over two; tangent theta equals negative square root of three over three