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Learsyguerra26
09.01.2020 •
Mathematics
Evaluate each of the following expressions without using a calculator. use radian measures.
e. sin−1(1) f. sin−1(−1)
g. cos−1(1) h. cos−1(−1)
i. tan−1(1) j. tan−1(−1)
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Ответ:
e)![\pi/2](/tpl/images/0447/6178/be8b7.png)
f)![3\pi/2](/tpl/images/0447/6178/35e92.png)
g)![0](/tpl/images/0447/6178/0d6c3.png)
h)![\pi](/tpl/images/0447/6178/f9356.png)
i)![\pi/4](/tpl/images/0447/6178/e5197.png)
j)![3\pi/4](/tpl/images/0447/6178/baff5.png)
Step-by-step explanation:
We can solve this exercise by watching a basic trigonometric table
Here i will list values of sin and cos in the points
and ![\pi](/tpl/images/0447/6178/f9356.png)
Hence, the sin takes the value 1 on
, while it takes the value -1 in its opposite value - \pi/2 (because it is an odd function). If we use the periodicity of the sin, then sin(- \pi/2 + 2 \pi) = -1. Hence ![sin^{-1}(-1) = 3 \pi/2](/tpl/images/0447/6178/e5009.png)
The cos takes value 1 in 0, and it takes the value -1 in![\pi](/tpl/images/0447/6178/f9356.png)
The tangent is the quotient between sin and cos. The tangent is 1 when both cos and sin are equal. We can see that they are equal in
, where they take the value ![\sqrt2 / 2](/tpl/images/0447/6178/91461.png)
The tangent is -1 where they are the opposite. This happens in
where they take the value
and
respectively.
Ответ:
answer:
this statement is true.