Question

Calcular: E = (sec245o + tg45o) ctg37o - 2cos60o

Answer 1

`-2.813`

Explanation:

Se simplifica inicialmente la fórmula en términos de las funciones trigonométricas fundamentales (Initially, the formula is simplified in terms of fundamental trigonometric functions):

`(\sec 245^(\circ) + \tan 45^(\circ) )\cdot \cot 37^(\circ) - 2\cos 60^(\circ)`

`\left((1)/(\cos 245^(\circ))+(\sin 45^(\circ))/(\cos 45^(\circ)) \right)\cdot \left((\cos 37^(\circ))/(\sin 37^(\circ)) \right) - 2\cdot \cos 60^(\circ)`

`(-2.366 + 1 )\cdot (1.327) - 1`

`-2.813`