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If A+B=225^(@) then (cotA)/(1+cotA).(cot...

If `A+B=225^(@)` then `(cotA)/(1+cotA).(cotB)/(1+cotB)` = ………….

A

1

B

`-1`

C

0

D

`(1)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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KUMAR PRAKASHAN-TRIGONOMETRIC FUNCTIONS -TEXTBOOK BASED MCQS
  1. If tantheta+sintheta=mandtantheta-sintheta=n then m^(2)-n^(2) = …………

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  2. cos105^(@)+sin105^(@) = …………

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  3. If A+B=225^(@) then (cotA)/(1+cotA).(cotB)/(1+cotB) = ………….

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  4. If y=(1+tanA)(1-tanB)andA-B=(pi)/(4) then (y+1)^(y+1) = …………

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  5. sin^(2)((pi)/(8))+sin^(2)((3pi)/(8))+sin^(2)((5pi)/(8))+sin^(2)((7pi)/...

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  6. (cos(17^(@))+sin(17^(@)))/(cos(17^(@))-sin(17^(@)))= …………

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  7. (sin(70^(@))+cos(40^(@)))/(cos(70^(@))+sin(40^(@)))= ..........

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  8. sin(12^(@))sin(48^(@))sin(54^(@))= ………..

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  9. The value of (1-tan^(2)(15^(@)))/(1+tan^(2)(15^(@))) is ………..

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  10. The value of (1-tan^(2)15^(@))/(1+tan^(2)15^(@)) is

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  11. cos^(2)(7(1^@)/(2))-cos^(2)(37(1^(@))/(2))= …………

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  12. The value of cos(480^(@))sin(150^(@))+sin(600^(@))cos(390^(@)) is …………...

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  13. cos((2pi)/(7))+cos((4pi)/(7))+cos((6pi)/(7))=

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  14. If (tanx)/(1)=(tany)/(2)=(tanz)/(3)(ne0)andx+y+z=pi then which of the ...

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  15. cos((pi)/(7))cos((2pi)/(7))cos((4pi)/(7))= ………..

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  16. sin((pi)/(16))sin((3pi)/(16))sin((5pi)/(16))sin((7pi)/(16))= ………..

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  17. cos^(2)((pi)/(12))+cos^(2)((3pi)/(12))+cos^(2)((5pi)/(12))= …………

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  18. If A=125 and x=sinA^(@)+cosA^(@) then ………..

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  19. The value of sqrt(3)cosec20^(@)-sec20^(@) is …………

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  20. If cosalpha=-(4)/(5),(pi)/(2)ltalphaltpi then tan((alpha)/(2))= ……….

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