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Question one review sheet on determine the value of a to 1 decimal place

Question one review sheet on determine the value of a to 1 decimal place-example-1

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2 votes

So,

Given:


\sin (A)=0.2588

We want to find the value of A.

For this, we could apply the sine inverse function:


A=\sin ^(-1)(0.2588)

Which is, rounded to one decimal place:


\sin ^(-1)(0.2588)=15.0

So, the result is 15.0 degrees.

The process is the same with b:


\begin{gathered} \cos (A)=0.6794 \\ A=\cos ^(-1)(0.6794) \\ A=47.2 \end{gathered}

Thus, A=47.2 degrees

User Whitney
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