document.write( "Question 1068408: Solve the equation cos⁡θ − 5cos⁡^3θ = 0 for all positive values of θ less than 360∘ . Give the answers to three significant digits in the order of increasing. \n" ); document.write( "

Algebra.Com's Answer #683650 by ikleyn(52879) $\"\"$ $\"About$

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\n" ); document.write( "Solve the equation cos⁡θ − 5cos⁡^3θ = 0 for all positive values of θ less than 360∘ . Give the answers to three significant digits in the order of increasing.
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document.write( " = 0  --->  \r\n" );
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document.write( " = 0 --->\r\n" );
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document.write( "This equation deploys in two independent equations \r\n" );
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document.write( "1)   = 0  --->   = 90°  or   = 270°.\r\n" );
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document.write( "2)   = 0  --->   = +/- = +/- 0.447.\r\n" );
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document.write( "    The solutions are  =  = 63.48°,  180°-63.48° = 116.12°, 180°+63.48° = 243.48°  and  116.12° + 180° = 296.12°.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Answer. The solutions are $\"theta\"$ = 90°, 270°, 63.48°, 116.12°, 243.48° and 296.12°.\r
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