# General Information, Facts & Tables [Trigonometric Formula Calculator]

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Overview

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Probably the most important geometric equations are the relationship between the angles and sides of a right angled triangle. Given any two variables the remaining values can be calculated.

See Also: Open Another, Using the Calculators

Formula

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 Known Required A B C a b A & B - - C = (A2 + B2)0.5 a = arc tan( A / B ) b = arc tan( B / A ) A & C - B = (C2 - A2)0.5 - a = arc sin( A / C ) b = arc cos( A / C ) A & b - B = A * tan( b ) C = A / cos( b ) a = 90º - b - A & a - B = A / tan( a ) C = A / sin( a ) - b = 90º - a B & C A = (C2 - B2)0.5 - - a = arc cos( B / C ) b = arc sin( B / C ) B & b A = B / tan( b ) - C = B / sin( b ) a = 90º - b - B & a A = B * tan( a ) - C = B / cos( a ) - b = 90º - a C & b A = C * cos( b ) B = C * sin( b ) - a = 90º - b - C & a A = C * sin( a ) B = C * cos( a ) - - b = 90º - a

Units

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A = Length (metre [m])
B = Length (metre [m])
C = Length (metre [m])
a = Angle (degree [º])
b = Angle (degree [º])

Calculator

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Show all available units

A []:

B []:

C []:

a []:

b []:

Note! Set unit values prior to calculating.