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( 2tan 30 ^(@) )/( 1+tan ^(2) 45^(@) ) =...

`( 2tan 30 ^(@) )/( 1+tan ^(2) 45^(@) ) =`

A

`sin 60^@`

B

`cos 60^@`

C

`tan 30^@`

D

`sin 30^@`

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VGS PUBLICATION-BRILLIANT-TRIGONOMETRY-EXERCISE
  1. Evaluate the following 2 tan ^(2) 45^(@) +cos^(2) 30 ^(@) -sin ^(2)...

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  2. Evaluate the following (sec^(2) 60^(@) -tan ^(2) 60^(@) )/( sin ^(2...

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  3. ( 2tan 30 ^(@) )/( 1+tan ^(2) 45^(@) ) =

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  4. ( 1-tan ^(2) 45^(@) )/( 1+tan ^(2) 45^(@)) =

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  5. (2 tan 30^(@))/( 1-tan ^(2) 30^(@)) =

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  6. Is it right to say that cos ( 60^(@) + 30 ^(@) ) = cos 60^(@) cos 30 ^...

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  7. In right angle triangle Delta PQR ,right angle at Q,PQ = 6cm and angl...

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  8. In Delta XYZ , right angle is at Y,YZ =x, and XZ =2x Then determine an...

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  9. Is it right to say that sin (A+B) =sin A +sin B ? Justify your answer...

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  10. Check and discuss the above relations in the case of angles between 0^...

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  11. Check and discuss the below relations in the case of angles between 0°...

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  12. Check and discuss the below relations in the case of angles between 0°...

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  13. Check and discuss the below relations in the case of angles between 0°...

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  14. Check and discuss the above relations in the case of angles between 0°...

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  15. Check and discuss the above relations in the case of angles between 0°...

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  16. Evaluate (sec 35^(@))/( cosec 55^(@))

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  17. If cos 7A =sin (A-6^(@)) , where 7A is an acute angle ,find the valu...

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  18. If sin A =cos B , then prove that A+B =90 ^(@)

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  19. Express sin 81^(@) +tan 81^(@) in terms of trigonometric ratio of angl...

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  20. If A , B and C are interior angles of triangle ABC ,then show that sin...

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