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Form of complex numbers - Answer a + bi Real and imaginary parts of z = a + bi - Answer Re(z) = a, Im(z) = b When two complex numbers are equal, what is true - Answer Their real parts are equal and their imaginary parts are equal i² - Answer -1 i³ - Answer -i i⁴ - A...

1 + tan2θ - Answer = sec2θ cot2θ + 1 = cosec2θ - Answer = cosec2θ Sin2θ - Answer 2sinθcosθ Cos2θ - Answer cos²θ-sin²θ 2cos²θ-1 1-2sin²θ Tan2θ - Answer 2tanθ / (1 - tan²θ) How do you write a rational number in a proof? - Answer a/b What does ...

if two lines are perpendicular, what must their gradients equal to when multiplied together? - Answer -1 What is the equation to calculate the gradient of a line? - Answer y₂-y₁/x₂-x₁ What is the equation to calculate the length of a line? - Answer √(y₂−y₁)^2 + (x₂-x...

Population - Answer The whole set of items that are of interest Census - Answer Observes or measures every member of a population Sample - Answer A selection of observations taken from a subset of the population which is used to find out information about the population as a whole ...

What does 1/x inegrate to? - Answer ln(|x|) + C How does you integrate ∫x^n dx? - Answer x^(n+1)/ (n+1) + C An increasing function is that which has a positive.... - Answer Gradient dy/dx>0 A decreasing function is that which has a negative... - Answer Gradient dy/dx<0...

- Sn = n/2 (2a + (n-1)d) - Sn = n/2 (a + l) where a is the first term and l is the last term - Answer formula of an arithmetic series the sum of the terms of an arithmetic sequence - Answer what is an arithmetic series - Un = a + (n-1)d - a = the first term - d = the common difference...

when is a curve convex - Answer gradient is decreasing (second derivative < 0 ) when is a curve concave - Answer gradient is increasing ( second derivative > 0 ) cosine rule - Answer a² = b² + c² - 2bcCosA area of triangle - Answer A=1/2absinC trig identity relating ...