alrighty well this week we started chapter 7: Trigonometry. So far its not hard at all but that doesnt mean it wont get harder. Mrs Robinson said that trig builds each section so make sure you understand every section or you may struggle.
Okay well to summarize section 7.1......
Angles are measured in degrees. (either minutes' or seconds") or radians
To find minutes, multiply what is behind the decimal by 60
To find seconds, multiply what is behind the decimal of minutes by 60; divide seconds by 3600 to get decimal.
radians=degrees x pi/180
degrees=radians x 180/pi
Remember to always ues exact answers. Never plug pi into calculator.
example:
12.3 o
12 o(.3 x 60)
12 o 18'
225 o convert to radians
225 x pi/180 = 225/180 pi = 5/4 pi
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