sin135°-cos120°/sin135°+cos120°=3+2√2
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Step-by-step explanation:
(sin135 - cos120) / (sin135 + cos120) = 3 + 2 * v2
[sin (90 + 45) - cos(60 + 60)] / [(sin (90 + 45) + cos (60 + 60)]
(sin90cos45 + cos90sin45) - (cos60.cos60 - sin60.sin60) / (sin90cos45 + cos90sin45) + (cos60.cos60 - sin60.sin60)
cos45 - ( 3/4 - 1/4) / cos45 + ( 3/4 - 1/4)
(1 / v2 - 1 / 2) / ( 1 / v2 + 1 / 2)
[( v2 - 1) / 2 ] / [ ( v2 + 1) / 2 ]
( v2 - 1) / ( v2 + 1)
( v2 - 1) * ( v2 - 1) / ( v2 + 1) * ( v2 - 1)
2 - 2v2 + 1 / (2 - 1)
3 -
gameg:
I did not understand
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