AssuntaGoering608 AssuntaGoering608
  • 15-07-2014
  • Mathematics
contestada

13. Find the exact value of sin 30 ° - sin 45 ° cos 45 ° .
a. 0
b. 1/2
c. 1
d. 2

Respuesta :

Аноним Аноним
  • 15-07-2014
[tex]sin30^o-sin45^ocos45^o\\\\sin30^o=\frac{1}{2}\\\\sin45^o=cos45^o=\frac{\sqrt2}{2}\\\\sin30^o-sin45^ocos45^o=\frac{1}{2}-\frac{\sqrt2}{2}\cdot\frac{\sqrt2}{2}=\frac{1}{2}-\frac{2}{4}=\frac{1}{2}-\frac{1}{2}=0\\\\Answer:a.[/tex]
Answer Link
vaibhavay
vaibhavay vaibhavay
  • 15-07-2014
sin30  1/2
sin45*cos45=1/2
=>  1/2  -  1/2 = 0
Answer Link

Otras preguntas

Solve 4sin2θ + 4cosθ - 5 = 0 for 0° ≤ θ < 180°. Ø 0° 30° 60°
Name four abiotic factors found in a prairie ecosystem? Please help me fast as you can...
Who was Peter the Great and what did he do to earn the name?
A cart is rolling across the floor at a constant velocity of 2 m/s to the right. The cart is pushed again to the right, and it starts to accelerate. How are t
Water bill was $48.15 percent lower
Liver disorders are responsible for __________ of the deaths associated with alcoholism.
Modern written numbers were first developed by the mathematicians of a. India b. Arabia c. China d. France
Both the han dynasty and the Roman Empire were known for
The system of promises which governed the relationship between lords and vassals was 1. Middle Ages. 2. futile. 3. feudalism.
Assuming motion is on a straight path, what would result in two positive components of a vector?