If tana+tanb+tanc=tanatanbtanc then

     

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For all values of A & B `tan(A+B)=(tanA+tanB)/(1-tanAtanB)` & `tan(A-B)=(tanA-tanB)/(1+tanAtanB)`


Prove sầu that `sin(A+B+C)=sinAcosBcosC+cosAsinBcosC+cosAcosBsinC-sinAsinBsinC` `cos(A+B+C)=cosAcosBcosC-cosAsinBsinC-sinAcosBsinC-sinAsinBcosC`


Jee 2021 | Division And Distributions-Iii | Examples | Important Results Of Straight Lines | Allied Angles | Examples | Learn Different Forms of Equations of Circles in One Class | Introduction To Cartesian Coordinate Geometry | Introduction | Imaginary Number | Powers Of Iota | Complex Numbers | Examples | Jee | Permutation And Combinations | L1 | Factorial Notation | Examples | Definition And Different Forms Of Straight Line | Introduction | Inequalities | Algebraic Solution và Graphical Representation of Linear Inequalities in one Variable | Examples


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