If a side and an angle are  known

Solve

Formulas

D & B

A

Tan D x B

Or

B / tan E

D & B

C

B / cos D

Or

B / sin E

D & A

B

A / tan D

Or

A x tan E

D & A

C

A / sin D

Or

A / cos E

D & C

A

Sin D x C

Or

Cos E x C

D & C

B

Cos D x C

Or

Sin E x C

D

E

90 - D

E

D

90 - E

If two sides are known

Solve

Formulas

A & B

D

Tan^-1(A / B)

A & C

D

Sin^-1(A / C)

B & C

D

Cos^-1(B / C)

A & B

E

Tan^-1(B / A)

A & C

E

Cos^-1(A / C)

B & C

E

Sin^-1(B / C)