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sinx + sin^(2) x = 1 rArr cos^(2) x + co...

sinx + `sin^(2) x = 1 rArr cos^(2) x + cos^(4) x=`

A

0

B

1

C

2

D

-1

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AAKASH SERIES-TRIGONOMETRIC RATIOS-PRATICE SHEET (EXERCISE) (LEVEL-I(MAIN) (SINGLE ANSWER TYPE QUESTIONS)
  1. If sec^(4) theta+ sec^(2) theta = 10 +tan^(4)theta + tan^(2) theta, th...

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  2. cosecA + cot A=(2)/(3) rArr cos A=

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  3. sinx + sin^(2) x = 1 rArr cos^(2) x + cos^(4) x=

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  4. cosx+cos^(2) x = 1 rArr sin^(8) x + 2sin^(6) x+sin^(4) x =

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  5. If sin x + cos x =a then |sin x - cos x|=

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  6. If a sin^(2) theta+bcos^(2) theta = c, then tan^(2) theta =

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  7. (1+sinA)(1+sinB)(1+sinC) = (1-sinA)(1-sinB)(1-sinC) = k rArr k=

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  8. If (sin alpha + "cosec" alpha )^(2) + ( cos alpha + sec alpha )^(2)=k+...

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  9. If 1+sin x + sin^(2)x +….oo = 4 + 2sqrt(3), 0 lt x lt pi, x ne pi//2 t...

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  10. If asec theta + b tan theta = c then ( theta + bsec theta)^(2) =

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  11. The value of cos""(pi)/(7)+cos""(2pi)/(7)cos""(3pi)/(7)+cos""(4pi)/(7...

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  12. If piltalphalt(3pi)/(2) then sqrt((1-cosalpha)/(1+cosalpha))+sqrt((1+c...

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  13. (1+tan alpha tan beta)^(2) + (tan alpha -tan beta)^(2) =

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  14. cosec^(2)Acot^(2)A-sec^(2)Atan^(2)A-(cot^(2)A-tan^(2))(sec^(2)Acosec^(...

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  15. ( cos^(3) A + sin^(3) A )/( cos A + sin A ) + (cos^(3) A - sin^(3)A)/(...

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  16. If x = (2sintheta)/(1+costheta+sintheta), then (1-costheta+sintheta)/(...

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  17. sin10^(@) + sin20^(@)+sin30^(@)+….+sin360^(@)=

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  18. sin^(2)(51^(@)-x)+sin^(2)(39^(@)+x)=

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  19. cos^(2)(125^(@)-x)-cos^(2)(55^(@)+x)=

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  20. sin^(2)""(pi)/(18)+sin^(2)""(2pi)/(18)+sin^(2)""(4pi)/(18)+sin^(2)""(8...

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