03:45
How to show that sec(π/2-θ)=cosecθ, cosec(π/2-θ)=secθ and cot(π/2-θ)=tanθ geometrically
Mathematics Proofs - GCSE & A Level
Shared 12/03/2022
14:40
Trig Tricks: How to get cos(π/3, π/4, π/6) and sin(π/3, π/4, π/6) without a calculator
Mathematics Proofs - GCSE & A Level
Shared 22/12/2020