EDEXCEL A LEVEL MATHS QUESTION WITH 100% CORRECT
ANSWERS.
1 + tan2θ
= sec2θ
cot2θ + 1 = cosec2θ
= cosec2θ
sin2θ
2sinθcosθ
cos2θ
cos²θ-sin²θ
2cos²θ-1
1-2sin²θ
tan2θ
2tanθ / (1 - tan²θ)
, how do you write a rational number in a proof?
a/b
what does y=|f(x)| do?
reflects values below the x-axis in the x-axis
what does y=f(|x|) do?
reflects values of x≥0 in the y-axis
arithmetic sequence formula
a₁+(n-1)d
geometric sequence formula
uₙ = arⁿ⁻¹
convergent geometric series
convergent if |r|<1 where r is the common ratio
periodic sequences
sequence is periodic if terms repeat in a cycle
vectors and angles
ANSWERS.
1 + tan2θ
= sec2θ
cot2θ + 1 = cosec2θ
= cosec2θ
sin2θ
2sinθcosθ
cos2θ
cos²θ-sin²θ
2cos²θ-1
1-2sin²θ
tan2θ
2tanθ / (1 - tan²θ)
, how do you write a rational number in a proof?
a/b
what does y=|f(x)| do?
reflects values below the x-axis in the x-axis
what does y=f(|x|) do?
reflects values of x≥0 in the y-axis
arithmetic sequence formula
a₁+(n-1)d
geometric sequence formula
uₙ = arⁿ⁻¹
convergent geometric series
convergent if |r|<1 where r is the common ratio
periodic sequences
sequence is periodic if terms repeat in a cycle
vectors and angles
