Pleaseee help guys:(
2 answers:
Answer:
Step-by-step explanation:
Note that this looks like the identity:
cos(A + B) = cosAcosB - sinAsinB.
In this case, A = π/12 and B = 3π/4. So, we can say that the given equation:
cos(π/12)cos(3π/4) - sin(π/12)sin(3π/4) = cos(π/12 + 3π/4) = cos(π/12 + 9π/12) = cos(10π/12) = cos(5π/6)
Ah, now we have a trigonometry problem we can easily solve!
cos(5π/6) = -cos(π/6) = -(√3)/2
Hope this helps!
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Answer:
No you do not.
This is because we can use Pythagoras Theorem to show that our location sits outside the 15 mile radius of the cell tower.
To work is out you would write the equation
Then to work out the Hypotheses you would
Which proves that the location is outside of the 15 Mile radius of the cell tower.