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AP Calculus AB/BC
The sine of an angle θ is the ratio of the length of the side opposite to θ in a right triangle to the length of the hypotenuse.
congrats on reading the definition of sinθ. now let's actually learn it.
Cosine (cosθ): The cosine of an angle θ is the ratio of the length of the adjacent side to θ in a right triangle to the length of the hypotenuse.
Tangent (tanθ): The tangent of an angle θ is equal to sine divided by cosine, or opposite over adjacent.
Cosecant (cscθ): The cosecant function is equal to 1 divided by sine, or hypotenuse over opposite.