Question

Trigonometry defenition

Answer 1

Answer:

Trigonometry is the type of mathematics that deals with the relationship between the sides and angles of triangles.

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Answer 2

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✦ Trigonometry:- It is that branch or mathematics which deals with the measurement of angles and the problems allied with angles.

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➥Some trigonometric identities:-

• Sin²θ + cos²θ = 1

• 1 + tan²θ = sec² θ

• 1 + cot²θ = cosec²θ

• tanθ = sinθ/Cosθ and cotθ = Cosθ/sinθ

• tanθ × cotθ = 1

➥ Trigonometric ratios of complementary angle

☛ Complementary angles :- Two angles are said to be complementary if their sum is 90° Thus, θ and (90° - θ ) are complementary angles.

• Sin (90° - θ) = cosθ

• Cos (90° - θ) = sinθ

• tan (90° - θ) = cotθ

• cot (90° - θ) = tanθ

• sec (90° - θ) = cosecθ

• cosec (90° - θ) = secθ