How many times does 12 go into 110
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Finding the difference between the two temperatures, it is found that Regina is 38.7ºC degrees colder in January than in July.
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- The mid-afternoon temperature in January is of -12.6ºC.
- In July, it is of 26.1ºC.
- The difference of the temperatures is given by:
From the difference of 38.7ºC, there are two interpretations:
- Regina is 38.7ºC degrees colder in January than in July.
- Regina is 38.7ºC degrees warmer in July than in January.
A similar problem is given at brainly.com/question/22136310
You are asked to solve the equation 
. I have chosen to use x instead of theta but the work is the same.
Notice that you have a quadratic equation set equal to 0. The expression at left can be factored. We do this as follows:
You have a product (at left) that equals to zero so one or both of the terms equals zero. That is,
cosx=0 and/or
To solve the first we are looking for an angle measure between 0 and 180 degrees door which the cos of that angle is 0. You can use your calculator and input
and will find the answer to be 90 degrees. You might also know this from the graph of the cosine function.
The second equation can be solved as follows:
You are looking for an angle whose cosine is 3/8 and can use the cosine inverse function on your calculator. Input
. The answer will be extremely close to 68 degrees and is 68 degrees when rounded.
Thus the two solutions we are looking for are 90 degrees and 68 degrees.
Please note that for this to work your calculator needs to be in degrees (not radians) and that you can control this in the “mode”.
Notice that you have a quadratic equation set equal to 0. The expression at left can be factored. We do this as follows:
You have a product (at left) that equals to zero so one or both of the terms equals zero. That is,
cosx=0 and/or
To solve the first we are looking for an angle measure between 0 and 180 degrees door which the cos of that angle is 0. You can use your calculator and input
The second equation can be solved as follows:
You are looking for an angle whose cosine is 3/8 and can use the cosine inverse function on your calculator. Input
Thus the two solutions we are looking for are 90 degrees and 68 degrees.
Please note that for this to work your calculator needs to be in degrees (not radians) and that you can control this in the “mode”.