frogs29
Find the value of x. Round to the nearest tenth. The diagram is not drawn to scale
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frogs29
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frogs29
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@Opcode
frogs29
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@hba
frogs29
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@amistre64
amistre64
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which trig function would you use with the information given?
frogs29
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wouldnt you use cosine?
amistre64
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start out by writing down the 3 basic trig functions for me ...
frogs29
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well there are sine and cosine i know for sure
amistre64
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good, and also tangent.
how do we define them in terms of the sides of a triangle? using opposite, adjacent, and hypotenuse ...
frogs29
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tangent and cotangent?
frogs29
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in not sure to be honest
amistre64
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then that is what you need to work on.
sin = opp/hyp
cos = adj/hyp
tan = opp/adj
given these 3 basic trig functions, which one uses the information given?
amistre64
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you might wanna use words that you like :) i tend to use over, next.to, and slant becasue they sound less babbley
frogs29
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So this triangle i would use tangent then?
amistre64
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correct
tan(a) = over/next.to , lets fill in whats given
tan(15) = x/12
how do we move this about to get x all alone?
frogs29
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i have a quetion first. where and how do you get 15?
amistre64
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i have old eyes :) i read the 12 and 35 together and saw 15
frogs29
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oh ok lol so it would be tan(35)=x/12?
amistre64
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yes, then its just a little algebra to solve for x
frogs29
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so then i would multiply 12 and 35 together?
amistre64
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you are on the right track, but lets clarify that alittle
12 * tan(35) = x
you need a table or calculator for the tan(35) part
frogs29
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oh ok let me see
frogs29
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so it would be 8.40249045851651735
frogs29
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and rounding to the nearest tenth would be 8.4
amistre64
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correct
frogs29
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ok so that would be x then?
amistre64
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lets see.
12*tan(35) = x
8.4 = x
yep, im pretty sure that completes it :)
frogs29
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ok thank you so much would you be able to help me with one more?
amistre64
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prolly not, ive got a class starting soon
frogs29
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oh ok well thank you for your help i appreciate it!
amistre64
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good luck :)