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Popular >

(sin(-20))/(cos(380))+tan(200)

Solución

\frac{sin ( - 2 0 ^{\circ} )}{cos ( 38 0 ^{\circ} )} + tan (20 0^{\circ})

0

Pasos de solución

\frac{sin ( - 2 0 ^{\circ} )}{cos ( 38 0 ^{\circ} )} + tan (20 0^{\circ})

Simplificar

= \frac{sin ( - 2 0 ^{\circ} ) + tan ( 20 0 ^{\circ} ) cos ( 38 0 ^{\circ} )}{cos ( 38 0 ^{\circ} )}

Utilizar la siguiente propiedad:

sin (- x) = - sin (x)

sin (- 2 0^{\circ}) = - sin (2 0^{\circ})

= \frac{- sin ( 2 0 ^{\circ} ) + tan ( 20 0 ^{\circ} ) cos ( 38 0 ^{\circ} )}{cos ( 38 0 ^{\circ} )}

tan (20 0^{\circ}) = tan (2 0^{\circ})

tan (20 0^{\circ})

Reescribir

20 0^{\circ}

como

18 0^{\circ} + 2 0^{\circ}

= tan (18 0^{\circ} + 2 0^{\circ})

Utilizar la periodicidad de

tan

tan (x + 18 0^{\circ}) = tan (x)

tan (18 0^{\circ} + 2 0^{\circ}) = tan (2 0^{\circ})

= tan (2 0^{\circ})

= \frac{- sin ( 2 0 ^{\circ} ) + tan ( 2 0 ^{\circ} ) cos ( 38 0 ^{\circ} )}{cos ( 38 0 ^{\circ} )}

cos (38 0^{\circ}) = cos (2 0^{\circ})

cos (38 0^{\circ})

Reescribir

38 0^{\circ}

como

36 0^{\circ} + 2 0^{\circ}

= cos (36 0^{\circ} + 2 0^{\circ})

Utilizar la periodicidad de

cos

cos (x + 36 0^{\circ}) = cos (x)

cos (36 0^{\circ} + 2 0^{\circ}) = cos (2 0^{\circ})

= cos (2 0^{\circ})

= \frac{- sin ( 2 0 ^{\circ} ) + tan ( 2 0 ^{\circ} ) cos ( 2 0 ^{\circ} )}{cos ( 38 0 ^{\circ} )}

cos (38 0^{\circ}) = cos (2 0^{\circ})

cos (38 0^{\circ})

Reescribir

38 0^{\circ}

como

36 0^{\circ} + 2 0^{\circ}

= cos (36 0^{\circ} + 2 0^{\circ})

Utilizar la periodicidad de

cos

cos (x + 36 0^{\circ}) = cos (x)

cos (36 0^{\circ} + 2 0^{\circ}) = cos (2 0^{\circ})

= cos (2 0^{\circ})

= \frac{- sin ( 2 0 ^{\circ} ) + tan ( 2 0 ^{\circ} ) cos ( 2 0 ^{\circ} )}{cos ( 2 0 ^{\circ} )}

Re-escribir usando identidades trigonométricas:

tan (2 0^{\circ}) = \frac{sin ( 2 0 ^{\circ} )}{cos ( 2 0 ^{\circ} )}

tan (2 0^{\circ})

Utilizar la identidad trigonométrica básica:

tan (x) = \frac{sin ( x )}{cos ( x )}

= \frac{sin ( 2 0 ^{\circ} )}{cos ( 2 0 ^{\circ} )}

= \frac{- sin ( 2 0 ^{\circ} ) + \frac{s i n ( 2 0 ^{\circ} )}{c o s ( 2 0 ^{\circ} )} cos ( 2 0 ^{\circ} )}{cos ( 2 0 ^{\circ} )}

Simplificar

= 0

cot (- \frac{4 π}{3})

cos (0.3)

arctan (\frac{5}{1})

tan (\frac{π}{3} + \frac{π}{4})

sin (3 0^{\circ} + 4 5^{\circ})