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If thetalt22 1^(@)/2 then sqrt(2+sqrt(2+...

If `thetalt22 1^(@)/2` then `sqrt(2+sqrt(2+sqrt(2+2cos4theta)))=`

A

`1/4`

B

`2costheta`

C

`2"cos"theta/2`

D

`2"cos"theta/4`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-EXERCISE-1
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  2. (sin^(2)3A)/(sin^(2)A)-(cos^(2) 3A)/(cos^(2)A)=

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  3. If thetalt22 1^(@)/2 then sqrt(2+sqrt(2+sqrt(2+2cos4theta)))=

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  4. ( cos 2 alpha)/( cos^(4) alpha - sin^(4) alpha ) -(cos^(4) alpha + si...

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  5. If x=sqrt((1- cos theta )/(1+ cos theta )), " then " (2 x)/(1-x^(2))=

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  6. IF x^2+y^2=1 and P=(3x-4x^3)^2+(3y-4y^3)^2 then find 'P'.

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  7. IF y=(tan(pi/4+theta)+tan(pi/4-theta))/(tan(pi/4+theta)-tan(pi/4-theta...

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  8. (tan^(2)2theta-tan^(2)theta)/(1-tan^(2)2thetatan^(2)theta)=

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  12. If sin(alpha+beta)=1 and sin(alpha-beta)=1/2 where alpha,beta in [0,pi...

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  13. If costheta=-3/5 and 180^(@)ltthetalt270^(@) then "tan"theta/2=

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  16. cos^(2)""(3pi)/(5)+cos^(2)""(4pi)/(5)=

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  17. If A+B=60^(@) then cos^(2)A+cos^(2)B-cosA cosB=

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  18. If A-B=60^(@) then Sin^(2)A+Sin^(2)B-SinASinB=

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