In the ALTFP_SINCOS core, the sine of 210 degrees gives the wrong value. - In the ALTFP_SINCOS core, the sine of 210 degrees gives the wrong value. Description You may see this problem when implementing a sine function using the ALTFP_SINCOS Megacore in Quartus® II software versions 11.0 and 11.0SP1. Resolution To workaround this, change the <altfp_sincos_variant_file_name>.vhd file, line 22850 as follows: Change from: wire_mantissanorm_add_datab <= ( "0000000000000000000000" & mantissanormnode_w(12)); Change to: wire_mantissanorm_add_datab <= ( "0000000000000000000000" & mantissanormnode_w(11)); Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 11.1.2 11.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']