cheat sheet for intro to right angle trig

What are the Properties of Inverse Trigonometric Functions? Trigonometric Ratios Table cotangent or cotθ= Base/Perpendicular= Adjacent/Opposite.

secant or secθ = Hypotenuse/Base =Hypotenuse/ Adjacent.cosecant or cosecθ= Hypotenuse/Perpendicular= Hypotenuse/Opposite.Also, it’s obvious that they are trigonometric ratios. The reciprocal of sin, cos, and tan can also have names. tangent or tanθ= Perpendicular/Base= Opposite/Adjacent.cosine or cosθ= Base/ Hypotenuse= Adjacent/Hypotenuse.sine or sinθ= Perpendicular/ Hypotenuse= Opposite/Hypotenuse.Hypotenuse: It is the side opposite to the right angle of the triangle (or the largest side).

Opposite: It is the side opposite to angle being considered.

Adjacent: It is the side adjacent to the angle being considered.

But for ∠ABC, sinθ 2= Perpendicular/ Hypotenuse = AC/ABĬonfusing, isn’t? To remove this confusion, we will name different sides of the right-angled triangle as adjacent, opposite and hypotenuse.

For ∠BAC, sinθ 1= Perpendicular/ Hypotenuse = BC/AB.

(Right Angle Triangle ABC) Concepts of Trigonometric Ratiosįixing the base and perpendicular can be difficult sometimes. Then, for ∠BAC, value of sinθ = Perpendicular/ hypotenuse = BC/AB Also, if we chose AC as the base and BC as the perpendicular. In that case, side AB will be the hypotenuse. The most common trigonometric ratios are sine, cosine, and tangent.Ĭonsider a right-angle triangle ABC, right-angled at C. Trigonometric ratios are the ratios of sides of a right-angle triangle. You can download Trigonometry Cheat Sheet by clicking on the download button belowīrowse more Topics under Introduction To Trigonometry

Perpendicular: It is the side perpendicular to the base of the right-angled triangle.

Moreover, any of the two sides other than the hypotenuse can be chosen as the base for performing the calculation.

Base: The side on which the right angle triangle stands is known as its base.

Also, it is opposite the right angle of the triangle.

Hypotenuse: It is the largest side of the triangle.

Furthermore, each side of the right angle triangle has a name. A right-angle triangle is a special triangle in which one angle is 90 o and the other two are less than 90 o. Trigonometric Ratios are applicable only for a right-angle triangle. Trigonometric Ratios in Right Angle Triangle

Cheat sheet for intro to right angle trig