Sine and cosine identities symmetry (Hindi)

Name: Sine and cosine identities symmetry (Hindi)
Uploaded: 2018-08-03T06:28:34Z
Description: In this video, we'll find several trigonometric identities for sine and cosine by considering horizontal and vertical symmetries of the unit circle.

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In this video, we'll find several trigonometric identities for sine and cosine by considering horizontal and vertical symmetries of the unit circle.

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Radha Krishna
Posted 10 months ago. Direct link to Radha Krishna's post “How can sin be negative ?...”
How can sin be negative ??

I mean that- how can the length of a side of the triangle be negative, we know that length can never be negative then How we happened to find trigonometric ratios to be negative ?
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Radha Krishna
Posted 10 months ago. Direct link to Radha Krishna's post “I have a question - our s...”
I have a question - our school teacher said that in different quadrants sin, cos, tan, and their inverse have different signs.
my question is WHY??
please clear my doubt.
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Class 11 Math (India) - Hindi

Course: Class 11 Math (India) - Hindi > Unit 3

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Video transcript