Trigonometry Identities 2026
1. Reciprocal Identity Reciprocal Identity
sin θ=
2. Reciprocal Identity Reciprocal Identity
cos θ=
3. Reciprocal Identity Reciprocal Identity
tan θ=
4. Reciprocal Identity Reciprocal Identity
csc θ=
5. Reciprocal Identity Reciprocal Identity
sec θ=
6. Reciprocal Identity Reciprocal Identity
cot θ=
7. Pythagorean Identity
1/5
, Trigonometry Identities 2026
Pythagorean Identity
(sin/cos)
1=
8. Pythagorean Identity Pythagorean Identity
cos² θ=
9. Pythagorean Identity Pythagorean Identity
sin² θ=
10. Pythagorean Identity Pythagorean Identity
1 + tan² θ
11. Pythagorean Identity Pythagorean Identity
cot² θ + 1=
12. Quotient Identity Quotient Identity
tan θ=
13. Quotient Identity Quotient Identity
cot θ=
14. Pythagorean Identity Pythagorean Identity
tan² θ= sec² θ - 1
15. Pythagorean Identity
sec² θ - tan² θ
2/5
1. Reciprocal Identity Reciprocal Identity
sin θ=
2. Reciprocal Identity Reciprocal Identity
cos θ=
3. Reciprocal Identity Reciprocal Identity
tan θ=
4. Reciprocal Identity Reciprocal Identity
csc θ=
5. Reciprocal Identity Reciprocal Identity
sec θ=
6. Reciprocal Identity Reciprocal Identity
cot θ=
7. Pythagorean Identity
1/5
, Trigonometry Identities 2026
Pythagorean Identity
(sin/cos)
1=
8. Pythagorean Identity Pythagorean Identity
cos² θ=
9. Pythagorean Identity Pythagorean Identity
sin² θ=
10. Pythagorean Identity Pythagorean Identity
1 + tan² θ
11. Pythagorean Identity Pythagorean Identity
cot² θ + 1=
12. Quotient Identity Quotient Identity
tan θ=
13. Quotient Identity Quotient Identity
cot θ=
14. Pythagorean Identity Pythagorean Identity
tan² θ= sec² θ - 1
15. Pythagorean Identity
sec² θ - tan² θ
2/5
