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Trigonometry is the study of relationships that deals with angles,lengths and heights of triangles. Applications of trigonometry are also found in engineering, astronomy, Physics and architectural design. This chapter is very important as it comprises many topics like Linear Algebra, Calculus and Statistics.
Trigonometry is introduced in CBSE class 10. It is a completely new and tricky chapter where one need to learn all the formula and apply them accordingly. Trigonometry Class 10 formulas are tabulated below.
Trigonometric Formulas:
Applying Pythagoras theorem for the given right-angled theorem, we have:
(Perpendicular)2+(Base)2=(Hypotenuese)2
⇒(P)2+(B)2=(H)2
The Trigonometric properties are given below:
S.no
Property
Mathematical value
1
sinA
PH
2
cosA
BH
3
tanA
PB
4
cotA
BP
5
cosecA
HP
6
secA
HB
Relation Between Trigonometric Identities:
S.no
Identity
Relation
1
tanA
sinAcosA
2
cotA
cosAsinA
3
cosecA
1sinA
4
secA
1cosA
Trigonometric Identities:
- sin2A+cos2A=1
- tan2A=1+sec2A
- cot2A=1+cosec2A
Trigonometry is the study of relationships that deals with angles,lengths and heights of triangles. Applications of trigonometry are also found in engineering, astronomy, Physics and architectural design. This chapter is very important as it comprises many topics like Linear Algebra, Calculus and Statistics.
Trigonometry is introduced in CBSE class 10. It is a completely new and tricky chapter where one need to learn all the formula and apply them accordingly. Trigonometry Class 10 formulas are tabulated below.
Trigonometric Formulas:

Applying Pythagoras theorem for the given right-angled theorem, we have:
(Perpendicular)2+(Base)2=(Hypotenuese)2
⇒(P)2+(B)2=(H)2
The Trigonometric properties are given below:
S.no
|
Property
|
Mathematical value
|
1
|
sinA
|
PH
|
2
|
cosA
|
BH
|
3
|
tanA
|
PB
|
4
|
cotA
|
BP
|
5
|
cosecA
|
HP
|
6
|
secA
|
HB
|
Relation Between Trigonometric Identities:
S.no
|
Identity
|
Relation
|
1
|
tanA
|
sinAcosA
|
2
|
cotA
|
cosAsinA
|
3
|
cosecA
|
1sinA
|
4
|
secA
|
1cosA
|
Trigonometric Identities:
- sin2A+cos2A=1
- tan2A=1+sec2A
- cot2A=1+cosec2A
Trigonometry is the study of relationships that deals with angles,lengths and heights of triangles. Applications of trigonometry are also found in engineering, astronomy, Physics and architectural design. This chapter is very important as it comprises many topics like Linear Algebra, Calculus and Statistics.
Trigonometry is introduced in CBSE class 10. It is a completely new and tricky chapter where one need to learn all the formula and apply them accordingly. Trigonometry Class 10 formulas are tabulated below.
Trigonometric Formulas:

Applying Pythagoras theorem for the given right-angled theorem, we have:
(Perpendicular)2+(Base)2=(Hypotenuese)2
⇒(P)2+(B)2=(H)2
The Trigonometric properties are given below:
S.no
|
Property
|
Mathematical value
|
1
|
sinA
|
PH
|
2
|
cosA
|
BH
|
3
|
tanA
|
PB
|
4
|
cotA
|
BP
|
5
|
cosecA
|
HP
|
6
|
secA
|
HB
|
Relation Between Trigonometric Identities:
S.no
|
Identity
|
Relation
|
1
|
tanA
|
sinAcosA
|
2
|
cotA
|
cosAsinA
|
3
|
cosecA
|
1sinA
|
4
|
secA
|
1cosA
|
Trigonometric Identities:
- sin2A+cos2A=1
- tan2A=1+sec2A
- cot2A=1+cosec2A
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