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General Information, Facts & Tables
[Trigonometric Formula Calculator]

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Page Topics:

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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Image displaying variables in trigonometric formula

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.