2 years ago

Which is the approximate measure of this angle? A. 30° B. 60° C. 105° D. 120°

1 answer:

8 0

B is the answer. Think of a clock, one hand at 12 and one hands at 3 is 90 degrees. That is a little less than 90 degrees so it's approximately 60 degrees.

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2 years ago

4. The cosine function can be made to have the same values as the sine function for each angle by including a shifted _______ in

r-ruslan [8.4K]

Answer: Option D

phase

Step-by-step explanation:

By definition, the cosine function has the following form

$y = cos (x - \phi)$

Where $\phi$ is known as the phase angle

By definition the sinx function is equal to the cosx function with a phase shift of $\frac{\pi}{2}$

So if we have the function

$y = cos (x - \phi)$ and we want to transform it into the function $y=sin(x)$ then $\phi = \frac{\pi}{2}$

Finally

$y = cos(x - \frac{\pi}{2})=sin(x)$

the answer is the option D

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