Imagine the graph of f(x)=|x|. This can only output positive values (
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).
Then f(x)=|x|+2 is the same graph shifted upwards by two units meaning it can only output values bigger or equal to than 2. So the range is
Answer: 90°
Explanation: the sum of all the angles in a triangle = 180. So 70 + 30 = 90 and 180-90=90
Answer: r = 4 sec θ
Explanation: Using: x = r cos θ then r cos θ = 4 ⇒ r = 4 cos θ = 4 sec θ
Equate whats inside (arguments)
with base period of sine function
and solve for x to get period,
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So the period of the graph of the given function is precisely 2.
Hope this helps :)