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.
Answer: 60°
Step-by-step explanation: A straight angle is 180°
180°- 120° = 60°
Answer:
y= 3cb/ 5t
Step-by-step explanation:
combine 5 and t/4
5t/4 times y= 3(b/4) times c
combine 5t/4 and y
5ty/4=3(b/4) times c
combine 3 and b/4
5ty/4= 3b/4 times c
combine 3b/4 and c
5ty/4=3bc/4
multiply each term in 5ty/4=3bc/4 by 4/5t to eliminate the fractions
y=3bc/4 times 4/5t
simplify
y=3cb/5t
If he is 6 feet and casts a shadow which is 4 feet long and the tree is 20 feet long you can see that frank decreases by 2 so the tree decrease by two which is 18
Answer:
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Step-by-step explanation: