问题
填空题
化简:
|
答案
=cos(θ+
)sin(θ+3π)π 2 sin(θ-
)cos(θ-2π)tan(θ+π)π 2
=sinθsinθ -cosθcosθtanθ
=-tanθ.sinθsinθcosθ -cosθcosθsinθ
故答案为:-tanθ.
化简:
|
=cos(θ+
)sin(θ+3π)π 2 sin(θ-
)cos(θ-2π)tan(θ+π)π 2
=sinθsinθ -cosθcosθtanθ
=-tanθ.sinθsinθcosθ -cosθcosθsinθ
故答案为:-tanθ.