# Khan/khan-exercises

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 eb168d3 Add exercise -- trigonometry 1 igorT authored Jul 20, 2011 1 a5025b8 Accept improper fractions, fix trig function display issue, tag all trig... mwahl authored Feb 19, 2012 2 eb168d3 Add exercise -- trigonometry 1 igorT authored Jul 21, 2011 3 4 4e4cb9b lint: tabs->spaces and jQuery->$for exercises beneater authored Apr 10, 2012 5 6 Trigonometry 1 7 8 eb168d3 Add exercise -- trigonometry 1 igorT authored Jul 21, 2011 59 60 4e4cb9b lint: tabs->spaces and jQuery->$ for exercises beneater authored Apr 10, 2012 61
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63 randRange(3, 10) 64 randRange(3, 10) 65 BC 66 AC * AC + BC * BC 67 formattedSquareRootOf(AC * AC + BC * BC) 68 randFromArray([ 69 "ABC", 70 "BAC" 71 ]) 72 (ANGLE.substring(0,1) + ANGLE.substring(2)) 73 74 (function(){ 75 if ( OPPOSITE_NAME === "AC" ){ 76 return AC; 77 } 78 else if ( OPPOSITE_NAME === "BC" ){ 79 return CB; 80 } 81 return AB_STRING; 82 })() 83 84 85 "AB" 86 AB_STRING 87 88 ANGLE.substring(1) 89 90 (function(){ 91 if ( ADJACENT_NAME === "AC" ){ 92 return AC; 93 } 94 else if ( ADJACENT_NAME === "BC" ){ 95 return BC; 96 } 97 98 return AB_STRING; 99 })() 100 101 102 fraction( OPPOSITE_VALUE, ADJACENT_VALUE, false, false, false, false) 103 104 105 fractionReduce( OPPOSITE_VALUE, ADJACENT_VALUE, false, false) 106 107 108 "\\frac{" + OPPOSITE_VALUE + "}{" + formattedSquareRootOf(AB) + "}" 109 110 111 fractionSQRoot( OPPOSITE_VALUE , AB ) 112 113 114 "\\frac{" + ADJACENT_VALUE + "}{" + formattedSquareRootOf(AB) + "}" 115 116 117 fractionSQRoot( ADJACENT_VALUE , AB ) 118 119 120 121
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\overline{AC} is AC units long

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\overline{BC} is BC units long

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\overline{AB} is AB_STRING units long

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What is \sin(\angle ANGLE) ?

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134 betterTriangle( BC, AC, "A", "B", "C", BC, AC, AB_STRING ); 135 path([ [ 0.4, 0 ], [ 0.4, 0.4 ], [ 0, 0.4 ] ]); 136
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SIN
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• COS
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• SIN
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• TAN
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• \dfrac{1}{AB}
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• \dfrac{1}{BC}
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• \dfrac{1}{AC}
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• \dfrac{2 \sqrt{2}}{AC}
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SOH CAH TOA

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Sin = Opposite over Hypotenuse

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opposite = \overline{OPPOSITE_NAME} = OPPOSITE_VALUE

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hypotenuse = \overline{HYPOTENUSE_NAME} = AB_STRING

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\sin(\angle ANGLE)=SIMPLE_SIN

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=SIN

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\overline{AC} is AC units long

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\overline{BC} is BC units long

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\overline{AB} is AB_STRING units long

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What is \cos(\angle ANGLE) ?

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170 betterTriangle( BC, AC, "A", "B", "C", BC, AC, AB_STRING ); 171 path([ [ 0.4, 0 ], [ 0.4, 0.4 ], [ 0, 0.4 ] ]); 172
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COS
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SOH CAH TOA

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hypotenuse = \overline{HYPOTENUSE_NAME} = AB_STRING

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\cos(\angle ANGLE )=SIMPLE_COS

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=COS

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\overline{AC} is AC units long

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\overline{BC} is BC units long

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\overline{AB} is AB_STRING units long

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What is \tan(\angle ANGLE) ?

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197 betterTriangle( BC, AC, "A", "B", "C", BC, AC, AB_STRING ); 198 path([ [ 0.4, 0 ], [ 0.4, 0.4 ], [ 0, 0.4 ] ]); 199
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TAN
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SOH CAH TOA

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opposite = \overline{OPPOSITE_NAME} = OPPOSITE_VALUE

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\tan(\angle ANGLE)=SIMPLE_TAN

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=TAN

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