NCERT ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
- Prove that: (sin 3 x +sin x) sin x + (cos 3x - cos x) cos x = 0
03:20
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- Prove that: 2cospi/(13)cos(9pi)/(13)+cos(3pi)/(13)+cos(5pi)/(13)=0
04:45
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- Prove that:(cos4x+cos3x+cos2x)/(sin4x+sin3x+sin2x)=cot3x
05:42
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- Prove that:(sinx-sin3x)/(sin^2x-cos^2x)=2sinx
04:01
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- Prove that:tan4x=(4tanx(1-tan^2x))/(1-6tan^2x+tan^4x)
06:09
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- Prove that: cot x cot 2x - cot 2x cot 3x - cot 3x cot x = 1
03:06
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- Prove that:cos6x=32cos^6x-48cos^4x+18cos^2x-1
04:12
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- Prove that : cos 4x = 1 - 8 sin^2 x cos^2 x.
06:17
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- Find sinx/2,cosx/2 and tanx/2of the following : cotx=-1/3, x in quad...
05:59
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- Find sinx/2,cosx/2and tanx/2 of the following : tanx=-4/3, x in quadra...
05:14
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- Two trees, A and B are on the same side of a river. From a point C in ...
03:41
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- A tree stands vertically on a hill side which makes an angle of 15^0 w...
05:35
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- Two ships leave port at the same time. One goes 24 km per hour in the ...
05:34
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- For any triangle ABC, prove that(b^2 - c^2) cotA + (c^2 - a^2) cotB + ...
06:24
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- For any triangle ABC, prove that(b^2-c^2)/(a^2)sin2A+(c^2-a^2)/(b^2)si...
07:47
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- For any triangle ABC, prove that acosA+bcosB+c cosC=2asinBsinC
05:36
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- For any triangle ABC, prove that(cosA)/a+(cosB)/b+(cosC)/c=(a^2+b^2+c^...
03:05
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- In any triangle ABC, if a=18 , b=24 , c=30, findcosA, cosB, cosC
01:57
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- For any triangle ABC, prove that(a+b)/c=(cos((A-B)/2))/(sinC/2)
03:38
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- In any triangle ABC, if a=\ 18 , b=\ 24 , c=\ 30, findsinA, sinB, sinC
02:13
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