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Thursday, November 21, 2013

A-Maths: Trigonometry


Maths Tuition | Tuition Agency

 Trigonometry: Introduction to Quadrant Rule


 1st Quadrant (0˚ to 90˚) → All Trigonometric Ratios are +ve

 2nd Quadrant (90˚ to 180˚) → Only Sine of the Angle is +ve

 3rd Quadrant (180˚ to 270˚) → Only Tangent of the Angle is +ve

 4th Quadrant (270˚ to 360˚) → Only Cosine of the Angle is +ve



The Quadrant Rule can be remembered as CAST.
Quadrant Rule is a useful and essential method that is use to solve Trigonometric Equations to find Angles within a given range.
Enjoy learning!





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How to solve Sin q = a positive value?

Solving Trigonometric Equation by Quadrant Rule: Sin q = +ve value.




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How to solve Sin q = a negative value?

Solving Trigonometric Equation by Quadrant Rule: Sin q = - ve value.



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