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loser0123456
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I have an opposite leg of a right triangle that is 40mm long, I have an adjacent leg of 165mm what is the measure of angle a which is the angle in between the hypotenuse and the adjacent leg
loser0123456
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what is the sine, cosine, and tangent ratios for ∠ A.
DingusBrain
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i wont give u the answer
but i will help you
loser0123456
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ok that is what I wanted
DingusBrain
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first of all we need to use cosine since were dealing with adjacent/hypotenuse
DingusBrain
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what we first want to do tho is use tangent to find the length of the hypotenuse
DingusBrain
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actually for the hypotenuse we could do a^2=b^2=c^2
loser0123456
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the length is about 170
begzat
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But he need to find the angle
begzat
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not the hypotenuse
DingusBrain
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begzat
DingusBrain
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to find the angle you need to find the hypotenuse
begzat
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no
DingusBrain
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yep
DingusBrain
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169.78 is the length of the hypotenuse
loser0123456
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the hypotenuse is 170 so we dont need to find it
begzat
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do you know what is Trigonometric Ratios
DingusBrain
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alright then from there is pretty simple
loser0123456
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i rounded
begzat
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if you know Trigonometric Ratios formula you can find very easy the angle
loser0123456
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ok but what are the steps i forgot
begzat
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okay i will post the formulas and you will find wich one you need to use
loser0123456
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ok
begzat
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sin=opposite leg/ hypotenuse
cos=adjacent leg/hypotenuse
tan=opposite leg/ adjacent leg
begzat
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know which one you need to use
begzat
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now***
loser0123456
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so I need to use cosine
begzat
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no because you know opposite and adjacent leg
loser0123456
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i also know hypotenuse it is 170
begzat
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but on the question it said that you know opp. and adj.
begzat
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you can use tan if you want
loser0123456
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I forgot to post the hypotenuse
begzat
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okay so you can use all
loser0123456
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but which one helps me find my angle
begzat
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all
begzat
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you can use tan=opp./adjacent leg
loser0123456
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well can you help me with the steps for cos
Directrix
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>well can you help me with the steps for cos
The cosine of an acute angle of a right triangle is the ratio of the length of the leg adjacent to the hypotenuse to the hypotenuse length.
cos(A) = 165/169.78
cos(A) = 0.9718459 approx
A = ?
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