trig

AL数学：三角恒等式和近似值 Trig Identities and Approximations

From our first identity sin⁡²θ+cos²θ≡1, we have two new identities.Make sure you are happy with the following topics before contin

Remember how we said that sin⁡⁻¹, cos⁡⁡⁻¹ and tan⁡⁡⁻¹ aren’t quite the same as 1/sin⁡, 1/cos⁡ and 1/tan? Here’s why…