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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 C ( MULTIPLE AND SUBMULTIPLE ANGLES )
- Prove that cos. (pi)/(11). cos . (2 pi)/(11). cos . (3 pi)/(11) cos. (...
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- cos 10^(@) cos 30^(@) cos 50^(@) cos 70^(@) =
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- cos 24^(@) cos 48^(@) cos 96^(@) cos 192^(@) =
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- cos A cos 2A cos 4A .......cos^(2^(n-1))A=
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- sin 12^(@) * sin 24^(@) * sin 48^(@) * sin 84^(@) =
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- sin 10^(@) sin 30^(@) sin 50^(@) sin 70^(@) sin 90^(@)=
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- tan 20^(@) tan 40^(@) tan 60^(@) tan 80^@=
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- cos 36^(@) - cos 72^(@) =
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- cos^(2) 36^(@) + cos^(2) 72^(@)=
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- cos^(2)""(3pi)/(5)+cos^(2)""(4pi)/(5)=
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- sec72^(@) - sec 36^(@) =
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- Evaluate 6 sin 20^(@) - 8 sin^(3)20^(@).
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- tan 9^(@) - tan 27^(@) - tan 63^(@) + tan 81^(@) =
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- Find the value of sin^(2)42^(@)-sin^(2)12^(@).
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- Find the value of cos^(2)72^(@) - sin^(2) 54^(@).
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- 8 cos^(3) 10^(@) -6 cos 10^(@) =
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- 8 cos^(3) 20^(@) -6 cos 20^(@) =
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- 4(cos^3 20^(@) + cos^(3) 40^(@))=
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- 4( cos^(3) 10^(@) + sin^(3) 20^(@))=
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- if ( cos ^(3) 20^@ + cos^(3) 40^(@))/( cos 20^@+ cos 40^(@)) = k ,the...
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