Question

三角函数诱导公式

Answer 1

问：三角函数诱导公式

答：三角函数诱导公式： * sin(3π/2-α) = -cosα * cos(3π/2-α) = -sinα * tan(3π/2-α) = cotα * cot(3π/2-α) = tanα * sin(3π/2+α) = -cosα * cos(3π/2+α) = sinα * tan(3π/2+α) = -cotα * cot(3π/α+α) = -tanα * sin(π/2-α) = cosα * cos(π/2-α) = sinα * tan(π/2-α) = cotα * cot(π/2-α) = tanα * sin(π/2+α) = cosα * cos(π/2+α) = -sinα * tan(π/2+α) = -cotα * cot(π/2+α) = -tanα * sin(2π-α) = -sinα * cos(2π-α) = cosα * tan(2π-α) = -tanα * cot(2π-α) = -cotα * sin(π-α) = sinα * cos(π-α) = -cosα * tan(π-α) = -tanα * cot(π-α) = -cotα * sin(-α) = -sinα * cos(-α) = cosα * tan(-α) = -tanα * cot(-α) = -cotα * sin(π+α) = -sinα * cos(π+α) = -cosα