Answer:
you're not doing anything wrong
Step-by-step explanation:
In order for cos⁻¹ to be a function, its range must be restricted to [0, π]. The cosine value that is its argument is cos(-4π/3) = -1/2. You have properly identified cos⁻¹(-1/2) to be 2π/3.
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Cos and cos⁻¹ are conceptually inverse functions. Hence, conceptually, cos⁻¹(cos(x)) = x, regardless of the value of x. The expected answer here may be -4π/3.
As we discussed above, that would be incorrect. Cos⁻¹ cannot produce output values in the range [-π, -2π] unless it is specifically defined to do so. That would be an unusual definition of cos⁻¹. Nothing in the problem statement suggests anything other than the usual definition of cos⁻¹ applies.
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This is a good one to discuss with your teacher.
The probability of an ocean scene going on the gym wall is 16%
6 for $1.25= $1.25/6= $0.21
36 for $7.20= $7.20/36= $0.20
So the 36 ears for $7.20 is the better buy by 1cent
Is -1-2-3-4-5-6= - (1+2+3+4+5+6)=-21
It is an arithmetic sum
Answer:
-5/2
Step-by-step explanation:
to find the slope of the line, you have to do y1 - y2, over x1 - x2. That means that you do -5/2, and so that is the answer