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xyz xz Grade: 12th pass

why trigonometric idenetities are applicable for right angled triangles only?

7 years ago

Answers : (1)

AJIT AskiitiansExpert-IITD
68 Points

Dear Amarnath ,

consider cos2 x  +sin2 x  =1  , it is a trigonometric identity and applicable in all triangles. so are cos x = 1 /sec x. so it is your misconception that they can be applied to only right angled triangles.

if you were talking about identities like sinx  = altitude/hypotenuse  ,  then yes , they are applied to right angle triangles only because these quantities are defined like these. i guess it is clear now.


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7 years ago
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