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tan20tan40tan60 =tan20-tan40-tan60

tan20tan40tan60 =tan20-tan40-tan60

Grade:11

1 Answers

Rahul askIITiansExpert.IITR
110 Points
10 years ago
tan60=tan(40+20)

tan60=tan40 + tan20/(1-tan40tan20)

tan60-tan60tan40tan20=tan40+tan20

tan60tan40tan20=tan60-tan40-tan20

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