Question

Calcula : K=(sen20º+cos70º)sec70º

Answer 1

Resolución:

• sen20° = cos70°
• Sec70° = 1/cos70°

Entonces:

K = (cos70° + cos70°)1/cos70°

K = (2cos70°) 1/cos70°

K = 2

Respuesta: K = 2.

Espero que te sirva :D