document.write( "Question 148267: Cos 30 degrees = Sin ??? degrees \n" ); document.write( "
Algebra.Com's Answer #108669 by mangopeeler07(462)![]() ![]() ![]() You can put this solution on YOUR website! cos (x)=sin(90-x)\r \n" ); document.write( "\n" ); document.write( "cos (30)=sin (90-30)\r \n" ); document.write( "\n" ); document.write( "cos (30)=sin (60)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Why? \n" ); document.write( "Because cos is adjacent over hypotenuse \n" ); document.write( "and sin is opposite over hypotenuse\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If you draw a 30, 60, 90 degree triangle, the adjacent for 30 becomes the opposite for 60. So the cos of 30 would be the sin of 60. So it is the same ratio by a different name. \n" ); document.write( " |