P princesspiggy New Member Joined Nov 1, 2023 Messages 6 Gender Female HSC 2025 May 28, 2024 #1 the answer is r=100-130t but im not sure how to get to that (part a)
C cossine Well-Known Member Joined Jul 24, 2020 Messages 628 Gender Male HSC 2017 May 28, 2024 #2 a) is just simplification. So things like expansion, exponent rules and the special triangle.