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To find trigonometric functions first draw point in figure for better uderstanding

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From above figure, take angle at point (-3 , 4)

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Opposite = 3

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Adjacent = 4

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Hypotenuse =

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Hypotenuse = 5

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⇒ Formula for sine function

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Substitute Opposite = 3  and Hypotenuse = 5

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⇒ Formula for cos function

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Substitute  Adjacent = 4 and  Hypotenuse = 5

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In second quadrant (Q₂), cosθ is negative

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⇒ Formula for tan function

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Substitute Opposite = 3 and  Adjacent = 4

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In second quadrant (Q₂), tanθ is negative

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⇒ Formula for sec function

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Substitute  Adjacent = 4 and Hypotenuse = 5

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In second quadrant (Q₂), secθ is negative

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Solution :

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Required trigonometric functions are

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  ,     ,    and 

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