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Having trouble solving this problem from my ACT prep bookIt is trigonometry

Having trouble solving this problem from my ACT prep bookIt is trigonometry-example-1

1 Answer

4 votes

We need to convert 135.28º in degree, minute, and second measure.

In order to do so, notice that:


135.28\degree=135\degree+0.28\degree

Also,


1\degree=60^(\prime)

Thus, we have the proportion:

degrees minutes

1 60

0.28 x

Then:


x=0.28\cdot60=16.8

Thus:


0.28\degree=16.8^(\prime)=16^(\prime)+0.8^(\prime)

Now, notice that:


1^(\prime)=60^(\doubleprime)

Thus, we have the proportion:

minutes seconds

1 60

0.8 y

Then:


y=0.8\cdot60=48

Therefore:


135.28\degree=135\degree16^(\prime)48^(\doubleprime)^{}

And the first option is correct.

User Abha
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