Have seen examples in books where given angle is being subtracted to 180 before doing cosine. Hope someone could explain the reason why some do it? Like for example the angle given is 35 degrees, some do 180-35 and plug in the answer in cosine.
Yes, this works on any triangle provided you know 2 sides and the angle between them (if you rearrange the formula, it can also be used to find an angle if you know all 3 sides)
Because the value he has is the value of c squared. He needs to take the square root of c squared to get a value for c, and if you do it to one side of an equation you have to do it to the other side too.
Have seen examples in books where given angle is being subtracted to 180 before doing cosine. Hope someone could explain the reason why some do it? Like for example the angle given is 35 degrees, some do 180-35 and plug in the answer in cosine.
2:48 i thought no need put the approximately symbol? Just right (1d.p.) next to answer
This rule works in all non-right angle triangles too?
Yes, this works on any triangle provided you know 2 sides and the angle between them (if you rearrange the formula, it can also be used to find an angle if you know all 3 sides)
yo its the guy from that teen allowance show
bro did more in 3 minutes then my maths teacher in a year 💀
why do I square root at the end?
Because the value he has is the value of c squared. He needs to take the square root of c squared to get a value for c, and if you do it to one side of an equation you have to do it to the other side too.
Asian jesus?
Asian jesus.