*Periodic functions A function is said to be periodic if it repeats itself after a fixed period. For a periodic […]
*Finding values of θ > 900
*Property of supplementary angles. If α + β = 1800, then: sinα= sinβ,cosα = -cosβ & tanα= – tanβ
*Property of complementary angles. If α + β = 900, then: sinα = cosβ, cos α = secβ & tanα = […]
*The three sides and three angles are called its six elements. The angles are represented by the capitals letters A, […]
*Even & odd functions A function f (x) is called even, if f (- x) = + f (+x). called, […]
*Transformation formulae sinA + sinB = 2sinC cosD sinA – sinB = 2cosC sinD cosA + cosB = 2cosC cosD […]
*Semi angle formulae
*Expansion formulae sin (A ± B) = sin A cos B ± cos A sin B cos (A ± B) […]
>Trigonometric series
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