document.write( "Question 1016252: verify the trigonometric identity by rewriting the expression on one side of the identity in equivalent forms until it is identical to the expression on the other side.\r
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( "1 + sin x = cos x/sec x - tan x
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #632675 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! 1 + sin x = cos x/sec x - tan x \n" ); document.write( "------------ \n" ); document.write( "1 + sin x = cos^2 x - tan x \n" ); document.write( "1 + sin x = cos^2 x - tan x = cos^2 - sin/cos \n" ); document.write( "1 + sin x = cos^2 x - tan x = 1 - sin^2 - sin/cos = sin*(sin - 1/cos) \n" ); document.write( "1 + sin x = sin*(sin - 1/cos) \n" ); document.write( "@ x = 0, 1 + 0 =? 0*(0 - 1) \n" ); document.write( "Not an identity. \n" ); document.write( " |