OCR Maths A-level OCR MEI (B)
Quadratic Formula - ANS-x = -b ± √(b² - 4ac)/2a Pythagorean Theorem - ANS-a²+b²=c² (a^x)(a^y) - ANS-a^(x + y) a^x / a^y - ANS-a^(x - y) (a^x)^y - ANS-a^xy x = a^n - ANS-n = logA(x) logAx + logAy - ANS-logA(xy) kloga(x) - ANS-loga(x^k) straight line formula - ANS-(y - y1) = m(x-x1) perpendicular gradients are... - ANS-negative reciprocals General term of AP - ANS-Un = a + (n-1)d General term of GP - ANS-Un = ar^n-1 Sine rule - ANS-a/sinA = b/sinB = c/sinC Cosine rule - ANS-a² = b² + c² - 2bcCosA Triangle Area - ANS-1/2 ab sinC Cos^2A + Sin^2A= - ANS-1 1+tan^2A= - ANS-sec^2A cosec^2A - ANS-1 + cot^2A sin2A= - ANS-2sinAcosA cos2A= - ANS-cos^2A-sin^2A tan2A= - ANS-2tanA/1-tan^2A circumference - ANS-2π
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