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Identities of Plane Trigonometry

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Important Formulas and their Explanations (VI):
Identities of Plane Trigonometry
Pythagorean Relation
Pythagorean Identities

Pythagorean Identities

(a) (sin x)^2 + (cos x)^2 = 1

(b) 1 + (tan x)^2 = (sec x)^2

(c) 1 + (cot x)^2 = (cosec x)^2

See the attached file.

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This solution is comprised of a detailed explanation of the identities of plane trigonometry. It contains step-by-step explanation for the following problem.

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Important Formulas and their Explanations (VI):
Identities of Plane Trigonometry
Pythagorean Relation
Pythagorean Identities

Pythagorean Identities
...

Solution provided by:
Thokchom Sarojkumar Sinha, MSc
Education
  • BSc, Manipur University
  • MSc, Kanpur University
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