sin374°cos148°+sin77°cos58° 和sin(a+b)cos(γ-b)-cos(b+a)sin(b-γ)
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sin374°cos148°+sin77°cos58° 和sin(a+b)cos(γ-b)-cos(b+a)sin(b-γ)
1
sin347°cos148°+sin77°cos58°
=sin13°cos32°+cos13°sin32°
=sin(13+32)°
=sin45°
=√2/2
2
sin(a+b)cos(γ-b)-cos(b+a)sin(b-γ)
=sin(a+b)cos(γ-b)+cos(a+b)sin(γ-b)
=sin(a+b+b-y)
=sin(a-y)
sin(a+b)cos(γ-b)-cos(b+a)sin(b-γ)=sin(a+b)cos(γ-b)+cos(a+b)sin(y-b)=
=sin((a+b)+(γ-b))
=sin(a+y)
1 sin347°cos148°+sin77°cos58°
=_sin13°cos32°+cos13°sin32°
=-sin(13-32)°
=-s...
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sin(a+b)cos(γ-b)-cos(b+a)sin(b-γ)=sin(a+b)cos(γ-b)+cos(a+b)sin(y-b)=
=sin((a+b)+(γ-b))
=sin(a+y)
1 sin347°cos148°+sin77°cos58°
=_sin13°cos32°+cos13°sin32°
=-sin(13-32)°
=-sin(-19)°
=sin19°
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sin374°cos148°+sin77°cos58° 和sin(a+b)cos(γ-b)-cos(b+a)sin(b-γ)
sin347°cos148°+sin77°cos58°化简
sin347°cos148°+sin77°cos58°
sin347°cos148°+sin77°cos58°怎么算?
sin347°cos148°+sin77°cos58°等于多少,要具体过程,谢谢
求sin347°cos148°+sin77°cos58°的值
化简 (1) sin347°cos148°+sin77°cos58° (2)sin164°sin2化简(1)sin347°cos148°+sin77°cos58°(2)sin164°sin224°+sin254°sin314°
1.3/2cos x-√ ̄3/2sin x;2.sin347°cos148°+sin77°cos58°
sin347°cos148°+sin77°cos58°要求是利用和差公式化简有急用,明天就叫作业了···
tan525° 化简 用和(差)角公式 sin347°cos148°+sin77°cos58°化简 sin164°sin224°+sin254°sin31...tan525° 化简 用和(差)角公式 sin347°cos148°+sin77°cos58°化简 sin164°sin224°+sin254°sin314°化简
sin347度cos148度+sin77度cos58度=?
高一三角函数利用和(差)角公式化简.①√2 ̄ π √6 ̄ π ----sin(--- - x)+ ----cos(---- - x)4 4 4②sin347°cos148°+sin77°cos58°PS.π 代表数学符号“派”.可是我觉得好难,55555.第一题显示不出啊.那
sin347ºcos148º+sin77ºcos58º化简要过程
﹣sin347°×cos32°×cos58°×sin77°=
sin13°cos77°+cos13°sin77°=
13、化简:(1)3√15sinx+3√5cosx (2)3/2cosx-√3/2sinx (3)√3sinx/2+cosx/2(4)√2/4sin(π/4-x)+√6/4cos(π/4-x) (5)sin347°cos148°+sin77°cos58°(6)sin164°sin224°+sin254°sin314° (7)sin(a+b)cos(γ-b)-cos(b+a)sin
化简:(1)3/2cosx-√3/2sinx(2)√3sinx/2+cosx/2(3)√2/4sin(π/4-x)+√6/4cos(π/4-x)(4)sin347°cos148°+sin77°cos58°(5)sin164°sin224°+sin254°sin314°(6)sin(α+β)cos(γ-β)-cos(β+α)sin(β-γ)(7)sin(α-β)sin(β-γ)-cos(α-β)
已知向量a=(cos77°.sin77°)已知向量a=(cos77°,sin77°),b=(cos32°,sin32°),则a+b的膜长~