sin^2 x = 0.1175
x=?
maths
2008-09-14 8:59 pm
回答 (2)
2008-09-14 9:21 pm
✔ 最佳答案
sin2x = 0.1175
sinx = √0.1175 ooro sinx = -√0.1175
sinx = 0.3428 ooro sinx = -0.3428
When sinx = 0.3428
x = 20.05o ooro x = 180o - 20.05o
x = 20.05o ooro x = 159.95o
When sinx = -0.3428
x = 180o + 20.05o ooro x = 360o - 20.05o
x = 200.05o ooro x = 339.95o
Ans: x = 20.05o, x = 159.95o, x = 200.05o, or x = 339.95
=
2008-09-15 2:47 am
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