IF atanA+btanB=(a+b)tan((A+B)/2), a not equal to 0. then prove that:acosB=bcosA.
divya vikash , 15 Years ago
Grade 11
Trigonometry> prove...
1 Answersmycroft holmes
Hence, the equation can be written as
After cross multiplying and simplifying, we get
or
If sin(A-B) \= 0, then a cos B = b cos A
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