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

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

A

1

B

2

C

`-1`

D

0

Text Solution

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The correct Answer is:
B
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KUMAR PRAKASHAN-TRIGONOMETRIC FUNCTIONS -TEXTBOOK BASED MCQS
  1. If A+B=225^(@) then (cotA)/(1+cotA).(cotB)/(1+cotB) = ………….

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  19. If tanx=-(4)/(3),(pi)/(2)ltxltpi then sin((x)/(2))= …………

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  20. One of the roots of 4x^(3)-3x=(1)/(2) is ………

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