??? - 2013 JUNE Q3
3. Given that 2cos(x + 50)° = sin(x + 40)°
(a) Show, without using a calculator, that tan x° = 1/3(tan40°) (4)
(b) Hence solve, for 0 < 360, 2cos(2θ + 50)° = sin(2θ + 40)° giving your answers to 1 decimal place. (4)
(a) Show, without using a calculator, that tan x° = 1/3(tan40°) (4)
(b) Hence solve, for 0 < 360, 2cos(2θ + 50)° = sin(2θ + 40)° giving your answers to 1 decimal place. (4)