determinanya ordo 2x2 diperoleh dari :
-sinx(-sinx) - cosx(cosx) = 0
sin²x - cos²x = 0
sin²x - (1-sin²x) = 0
sin²x - 1 + sin²x = 0
2sin²x - 1 = 0
2sin²x = 1
sin²x = 1/2
sinx = √1/2
sinx = √2/2
sin 135 = √2/2
Jadi besar sudutnya 135 derajat
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determinanya ordo 2x2 diperoleh dari :
-sinx(-sinx) - cosx(cosx) = 0
sin²x - cos²x = 0
sin²x - (1-sin²x) = 0
sin²x - 1 + sin²x = 0
2sin²x - 1 = 0
2sin²x = 1
sin²x = 1/2
sinx = √1/2
sinx = √2/2
sin 135 = √2/2
Jadi besar sudutnya 135 derajat