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Tan13x=tan9x+tan4x+tan9x.tan4x.tan13x |
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Answer» 9x +4x =13x Taking tan on both sidesTan (4x+9x)=tan13x(Tan4x + tan9x ) / 1-- tan4x tan9x = tan13x Tan4x + tan9x = tan13x --tan4x tan9x tan13x ( cross multiply )Tan4x+tan9x + tan4x tan9x tan13x = tan13x take tan13x=tan(9x+4x)... then solve |
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