document.write( "Question 434108: the expression sin^2(0)-4+cos^2(0) is eqquivalent to:
\n" ); document.write( "a)-5
\n" ); document.write( "b)-4
\n" ); document.write( "c)-3
\n" ); document.write( "d)3
\n" ); document.write( "e)5 \n" ); document.write( "

Algebra.Com's Answer #300863 by richard1234(7193) $\"\"$ $\"About$

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Note that sin^2 (0) + cos^2 (0) = 1 (regardless if the argument is 0 or theta). Hence, the expression is equal to 1 - 4 = -3. \n" ); document.write( "

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