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2 0 using 'solve' with trigonometric functions ( 2015-11-30 18:29:37 +0100 )
10 0 using 'solve' with trigonometric functions ( 2015-11-30 17:01:08 +0100 )
10 0 using 'solve' with trigonometric functions ( 2015-11-30 08:16:51 +0100 )