document.write( "Question 1153127: What is the exact value of arccos(sin(-4/7)) without using a calculator?
\n" ); document.write( "I drew out the triangle of sin(-4/7) with it being in the 3rd quadrant, and found the other side to be -sqrt(33). I am unsure of what to do next. Thank you so much for your help! \n" ); document.write( "

Algebra.Com's Answer #775302 by ikleyn(52817) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "The formulation in the post is 100% wrong. An hieroglyph like \" sin(-4/7) \" is NEVER USED in Math.\r
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\n" ); document.write( "\n" ); document.write( "It is not possible to answer correctly in this formulation.\r
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\n" ); document.write( "\n" ); document.write( "I agree with tutor @greenestamps.\r
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\n" ); document.write( "\n" ); document.write( "The correct formulation (and uniquely possible in this context) is \r
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document.write( "    Find exact value of  .\r\n" );
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\n" ); document.write( "\n" ); document.write( "The answer then is \r
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document.write( "     =  =  = .\r\n" );
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\n" ); document.write( "\n" ); document.write( "It seems to me sometimes, that there is a special person on the opposite end of the Internet, who intently corrupts every coming post.\r
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