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cos^2((pi)/(4)-theta)+cos^2((pi)/(4)+the...

`cos^2((pi)/(4)-theta)+cos^2((pi)/(4)+theta)=.....`

A

1

B

2

C

3

D

none of these

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A
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MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES AND FACTORIZATION FORMULAE-MCQs
  1. If theta+phi=alpha,tantheta=K.tanphi andsin(theta-phi)=m.sinalpha, the...

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  2. The value of (cot54^(@))/(tan36^(@))+(tan20^(@))/(cot70^(@)) is

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  3. cos^2((pi)/(4)-theta)+cos^2((pi)/(4)+theta)=.....

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  4. cot(pi/20).cot((3pi)/20)cot((5pi)/20)cot((7pi)/20)cot((9pi)/20)=....

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  5. cos(pi/12)+sin^2((3pi)/12)+sin^2((9pi)/12)+cos((11pi)/12)=...

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  6. Statement I : sin^2pi/8+sin^2(3pi)/8+sin^2(5pi)/8+sin^2(7pi)/8=2 State...

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  7. Find the value of sin^(2)5^(@)+sin^(2)10^(@)+sin^(2)15^(@)+..............

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  8. If sectheta=-13//5, where 90^(@) lt theta lt 180^(@),, then : sintheta...

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  9. If costheta=3//7,and theta lies in the fourth quadrant, evaluate : sin...

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  10. If sqrt(2+sqrt(2+2cos4x))=K. cosx, then : K=….

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  11. For any angle A, 4sinA.sin((pi)/(3)-A).sin((pi)/(3)+A)=.....

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  12. cos 20^@.cos 40^@.cos 60^@ cos 80^@=

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  13. tan2 0^0tan4 0^0tan6 0^0tan8 0^0

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  14. (1-tan^(2)(45^(@)-A))/(1+tan^(2)(45^(@)-A)) is equal to

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  15. If (sec8A-1)/(sec4A-1)=tanmA.cotnA, then: (m,n)-=....

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  16. If : sin(alpha//2)cos(alpha//2)=12/25. then: sinalpha=

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  17. If tanalpha=3, calculate : (2 sin 2alpha-3sin2alpha)/(4 sin2alpha+5cos...

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  18. If sinalpha+cosalpha=(1)/(5), find tan((alpha)/(2)).

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  19. If alphaandbeta are two angles in the first quadrant such that sin(alp...

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  20. sqrt(3)cossec2 0^0-sec2 0^0

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