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Title: Trigonometry Basics1
Description: Simple highschool concepts of Trigonometry with examples for brain farts
Description: Simple highschool concepts of Trigonometry with examples for brain farts
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Trigonometry Basics1
Sine (sin) =
Opposite
Hypotenuse
Cosecant (csc) =
Hypotenuse
Opposite
Adjacent
Secant (sec) =
Opposite
Cotangent (cot) = Opposite
Cosine (cos) = Hypotenuse
Tangent (tan) = Adjacent
Hypotenuse
Adjacent
Adjacent
Remember, most teachers won’t accept trig work if you don’t have some symbol in your
equations for the angle (like “X” or “ᵯ”) if you don’t have a measurement
Example:
acceptable trig equation:
●
●
sin(ᵯ) = opp / hyp
cos(25) = adj / 5
Unacceptable trig equation:
●
●
sin = opp / hyp
cos = adj / 5
Pythagorean Identities:
sin 2 + cos2 = 1 which means that tan 2 + 1 = sec 2 and 1 + cot2 = csc 2
Pythagorean Theorem:
Opposite 2 + Adj acent2 = H ypotenuse 2
Inverse Trig:
You can find an angle in a right triangle by solving with inverse trig
...
267
sin −1 (
...
47° = Y
○
●
√X 2 = √209 ≈ 14
...
47° ≈ 74
...
4
○ cos−1 ( 15 ) ≈ 74
...
53° = 15
...
47) = 15
○
15 • cos(15
...
46in = X
When using Trig to solve a right triangle on a coordinate plane:
●
●
●
X coordinate = sin(ᵯ)
Y coordinate = cos(ᵯ)
tan(ᵯ) = sin(ᵯ) ÷ cos(ᵯ)
Title: Trigonometry Basics1
Description: Simple highschool concepts of Trigonometry with examples for brain farts
Description: Simple highschool concepts of Trigonometry with examples for brain farts