SOLUTION: Sketch a triangle that has acute angle θ, and find the other five trigonometric ratios of θ. cot(θ)=1 I think I missing a step. Please help. Thank you.

Algebra ->  Trigonometry-basics -> SOLUTION: Sketch a triangle that has acute angle θ, and find the other five trigonometric ratios of θ. cot(θ)=1 I think I missing a step. Please help. Thank you.      Log On


   



Question 854305: Sketch a triangle that has acute angle θ, and find the other five trigonometric ratios of θ.
cot(θ)=1
I think I missing a step. Please help. Thank you.

Found 2 solutions by ewatrrr, AnlytcPhil:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi,
acute angle θ,
θ radians sin θ cos θ tan θ
0° 0 0 1 0
30° π/6 1/2 √3/2 √3/3
45° π/4 √2/2 √2/2 1
60° π/3 √3/2 1/2 √3
90° π/2 1 0 ─
cot(θ)=1
tan(θ)=1
sin(θ)= √2/2
csc(θ)= 2/√2
cos(θ)=√2/2
sec(θ)=2/√2
Following (cosx, sinx) Unit Circle Summary for Your reference, as well


Answer by AnlytcPhil(1806) About Me  (Show Source):
You can put this solution on YOUR website!
You were to sketch a triangle, not a circle.

cot(θ)=1

The cotangent is the adjacent over the opposite.

Write the 1 as 1%2F1

cot%28theta%29=1%2F1

Then when we draw the right triangle, we will make the adjacent side
to theta equal to the numerator of 1%2F1, which is 1 and the opposite
side of theta equal to the denominator of 1%2F1 which is 1 as well, so the
right triangle is:



Now we calculate the hypotenuse by the Pythagorean theorem:

hypotenuse%5E2=adjacent%5E2%2Bopposite%5E2

hypotenuse%5E2=1%5E2%2B1%5E2

hypotenuse%5E2=1%2B1

hypotenuse%5E2=2

sqrt%28hypotenuse%5E2%29=sqrt%282%29

hypotenuse+=+sqrt%282%29



Now the adjacent side = 1, the opposite side = 1, 
and the hypotenuse = sqrt%282%29

sin%28theta%29=opposite%2Fhypotenuse=1%2Fsqrt%282%29=sqrt%282%29%2F2
cos%28theta%29=adjacent%2Fhypotenuse=1%2Fsqrt%282%29=sqrt%282%29%2F2
tan%28theta%29=opposite%2Fadjacent=1%2F1=1
sec%28theta%29=hypotenuse%2Fadjacent=sqrt%282%29%2F1=sqrt%282%29
csc%28theta%29=hypotenuse%2Fopposite=sqrt%282%29%2F1=sqrt%282%29%2F2

And you were already given:

cot%28theta%29=adjacent%2Fopposite=1%2F1=1

Edwin