Question

k= Tan55 -Tan35/ tan20

Answer 1

Respuesta:

(Tan55-tan35) / tan 20. *

Recordar : (tan55-tan35) / 1 + tan55×tan35 = tan(55-35)

Recordar : tan55 = cot(90 - 55) = cot35

Recordat: cot35 × tan 35= 1

Entoncs= tan55 - tan35 = tan(55-35)(1 + tan55×tan35) **

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(Tan55-tan35) / tan20

tan(55-35)(1 + tan55×tan35) / tan20

Tan20(1 + cot35×tan35) / tan20

1 + cot35× tan35= 2

1 + 1 =2