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If x=30o , verify that : tan2x=(2tanx...

If `x=30o` , verify that : `tan2x=(2tanx)/(1-tan^2x)` (ii) `sinx=sqrt((1-cos2x)/2)`

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ICSE-CHAPTER REVISION (STAGE 2) -TRIGONOMETRY
  1. If A = 60 ^(@) and B = 30 ^(@) , find the value of (sin A cos B+ ...

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  2. If x= 15 ^(@) , evaluate : 4 cos 2x . Sin 4x. tan 3x- 1

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  3. If x=30o , verify that : tan2x=(2tanx)/(1-tan^2x) (ii) sinx=sqrt((1...

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  4. Find the value of : sqrt((1- sin ^(2) 60 ^(@))/(1- cos ^(2) 60^(@)))

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  5. If cos 3x= 0 and x is acute find the value of : sin x

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  6. If cos 3x= 0 and x is acute find the value of : cos 2x

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  7. If cos 3x= 0 and x is acute find the value of : cot^(2) x- cose...

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  8. If cot ^(2) A - 3 =0 find : sin 2A

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  9. If cot ^(2) A - 3 =0 find : cos 3A

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  10. The length of a string between a kite and a point on the ground is 90 ...

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  11. In the following figure , angle B = 90 ^(@) angle ADB = 30 ^(@) and a...

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  12. Evaluate : (cos 58 ^(@))/(sin 32^(@)) +(sin 22^(@))/(cos 68^(@)) - ...

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  13. Evaluate without using trigonometric tables. 2(("tan" 35^(@))/("cot"...

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  14. Evaluate : sec 26^(@) sin 64^(@) + (cosec 33^(@))/(sec 57^(@))

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  15. Evaluate ( 5 sin 66 ^(@))/( cos 24 ^(@)) -( 2 cot 85^(@))/(tan 5^(@...

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  16. Evaluate cos 40 ^(@) cosec 50 ^(@)+ sin 50 ^(@) sec 40 ^(@)

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  17. Evaluate sin 27 ^(@) sin 63 ^(@) - cos 63^(@) cos 27 ^(@)

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  18. Evaluate : 3(sin 72^(@))/(cos 18^(@))-(sec 32^(@))/(cosec 58^(@))

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  19. Evaluate 3 cos 80 ^(@) cosec 10 ^(@) + 2 cos 59 ^(@) cosec 31 ^(@...

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  20. Evaluate : (cos 75^(@))/ (sin 15^(@)) + (sin 12^(@))/ (cos 78^(@)) -...

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