Pure Maths

PURE MATHS CH9 VERIFIED 100% SOLUTIONS cosine rule (2) a² = b²+c²-2bcCosA CosA = (b²+c²-a²)/2bc Use trigonometric ratios for right angled triangles to prove the cosine rule the largest angle is always opposite the ... (2) largest side (and vice versa)

PURE MATHS 2023 A vector has both ... (2) magnitude and direction if the vector PQ = RS then... (2) they are equal in length and parallel If the vector PQ = -RS then... (2) they are equal in length but not parallel adding the vectors PQ + QP = 0 parallel vectors are... multiples of each other for the triangle ABC, the vector AB + BC = AC