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If sinx+sin^2x=1," then the value of "co...

If `sinx+sin^2x=1," then the value of "cos^12x+3cos^10x+3cos^8x+cos^6x-2` is equal to

A

0

B

1

C

`-1`

D

2

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A
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AAKASH INSTITUTE ENGLISH-TRIGNOMETRIC FUNCTIONS -Section-B (Objective Type Questions One option is correct)
  1. If the maximum value of cos(cosx) is a and minimum value is b, then

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  2. If (2sinA)/(1+sinA+cosA)=k then (1+sinA-cosA)/(1+sinA)=

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  3. If sinx+sin^2x=1," then the value of "cos^12x+3cos^10x+3cos^8x+cos^6x-...

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  4. If sum(r=15)^29(cos(rpi/2+theta)=S1 and sum(r=15)^29(sin(rpi/2+theta)...

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  5. The maximum value of cos^(2)(cos(33pi + theta))+sin^(2)(sin(45pi+theta...

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  6. If (sin^(4)x)/(2)+(cos^(4)x)/(3)=1/5, then

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  7. If asin^2theta+bcos^2theta=m, bsin^2phi+acos^2phi=n, atantheta=btanphi...

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  8. The value of tan((5pi)/12)-tan(pi/12) is

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  9. If sin alpha+sin beta=a and cos alpha-cos beta=b then tan((alpha-beta)...

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  10. If tanalpha=(sqrt(3)+1)/(sqrt(3)-1), then the expression cos 2alpha +(...

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  11. If 0 lt theta(2) lt theta(1) lt pi/4, cos (theta(1) + theta(2)) = 3/5 ...

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  12. If sintheta=1/2, cosphi=1/3 then theta+phi belongs to, where 0<theta ,...

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  13. The range of f(theta)=3cos^2theta-8sqrt(3) cos theta sin theta + 5 sin...

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  14. Find the maximum value of 1+sin((pi)/(4)+theta) +2sin ((pi)/(4)-thet...

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  15. The value of cos(pi/4)*cos(pi/8)*cos(pi/16)....cos(pi/(2^n)) equals

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  16. tan alpha + 2 tan 2alpha + 4 tan 4 alpha + 8 cot 8 alpha =

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  17. tanA +tanB + tanC = tanA tanB tanC if

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  18. The value of sin pi/n + sin (3pi)/n+ sin (5pi)/n+... to n terms is equ...

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  19. underset(r=1)overset(n-1)(sum)cos^(2)""(rpi)/(n) is equal to

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  20. If tantheta+tan(theta+pi/3)+tan(theta-pi/3)=ktan3theta then k is equal...

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