2.4 cosine law Let’s take a look at various trigonometric curves before moving on Understanding how the curves look for sine, cosine, tangent and their inverses can help you understand numbers in your calculations, and help predict whether those numbers are accurate

Sine curve 𝑦=𝑠𝑖𝑛𝑥

coSine curve 𝑦=𝑐𝑜𝑠𝑥

Sine & cosine curves overlapped

Tangent curve 𝑦=𝑡𝑎𝑛𝑥

𝑦= 𝑠𝑖𝑛 −1 𝑥 Inverse sine curve

𝑦= 𝑐𝑜𝑠 −1 𝑥 Inverse cosine curve

𝑦= 𝑡𝑎𝑛 −1 𝑥 Inverse Tangent curve

Tangent curve 𝑦=𝑡𝑎𝑛𝑥

Let’s do some board examples of Cosine Law.