Math, asked by Halim, 1 year ago

tan70°=tan20°+2tan50°
prove it by Right hand side

Answers

Answered by sukithdevadiga
1
tan20+2tan50 1/cot20+2/cot50 (Cot50+2cot20)/cot20×cot50
Answered by rdahin
0
RHS= tan 20+tan 50+tan50=tan(20+50)*(1-tan20*tan50) +tan50
=tan70*(1-tan20*tan50) +tan50=tan70-tan70*tan20*tan50+tan50
=tan70-tan50*1+tan50 (∵ tan20*tan70=1)
=tan70-tan50+tan50=tan70=LHS
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