Hi there!
We are given:
cos(7x)cos(4x) = -1 - sin(7x)sin(4x)
Begin by moving all terms with variables to one side:
cos(7x)cos(4x) + sin(7x)sin(4x) = -1
The corresponding trig identity is cos(A - B). Thus:
cos(7x - 4x) = cos(7x)cos(4x) + sin(7x)sin(4x) = -1
cos(3x) = -1
cos = -1 at π, so:
3x = π
x = π/3
We can also find another solution. Let 3π = -1:
3x = 3π
x = π
Thus, solutions on [0, 2π) are π/3 and π.
Answer:
For cylinder TSA this is simple equation TSA - TBA = LSA
total surface area subtract the total base area and we get the lateral.
To find base it is 2pi r^2
so 2pi x r x h - 2 pi x r^2 = lateral surface area
Step-by-step explanation:
Answer:
Idk the answer but if we run out of comments we use these
Step-by-step explanation:
Answer:
33%
Step-by-step explanation:
311-208=103 ponds lost
103/311=33%
-0.35, -0.3, 0.5, 0.55
is your answer
hope this helps
