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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

`sin 2 theta`

B

`cos 2 theta`

C

1

D

0

Text Solution

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The correct Answer is:
C
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MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS-MCQs
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  2. If : a = tan x, b = tan y , c=sqrt(1+a^(2)),d= sqrt(1+b^(2)), "then" ...

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

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  4. cot(pi/12) + cot((3pi)/12) + cos ((9pi)/12)+ cos ((11pi)/12)

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  5. cot,(pi)/(20).cot.(3pi)/(12)+cot.(7pi)/(20)cot.(9pi)/(20)=....

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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. If H is the orthocentre of fDelta ABC, then : sin(angle BHC)=

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  8. If H is the orthocentre of Delta ABC, then : cos(angle AHB)=

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  9. tan theta * (1+cos 2 theta)= A)2 sin thetaB)sin 2 thetaC)2 cos thetaD)...

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  10. (1+sec 2 theta)*sqrt(sec^(2) theta-1)= A)2 sec thetaB)sec 2 thetaC)2 t...

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  11. csc theta - 2 cos theta * cot 2 theta = A)2 sin thetaB)sin 2 thetaC)2 ...

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  12. If : (1+sin theta +cos theta)/(1+sin theta - cos theta)=f((theta)/(2))...

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  13. (1-tan^(2)(45^(@)-A))/(1+tan^(2)(45^(@)-A)) is equal to

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  14. (sin 3 theta)/(sin theta)-(cos 3 theta)/(cos theta)= A) sin 2 thetaB) ...

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  15. (sin 2 theta)/(sin theta)-(cos 2 theta)/(cos theta)= A)sec theta B)ta...

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  16. sin 2 theta * (tan theta + cot theta)= A)sec thetaB)csc thetaC)1D)2

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  17. If sqrt((1-sinx)/(1+sinx))= f(pi/4-x/2) then f=

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  18. cot ((A)/(2))-tan((A)/(2))= A)2 sin AB)2 cos AC)2 tan AD)2 cot A

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  19. 8 sin theta * cos theta * cos 2 theta * cos 4 theta = A)sin 4 thetaB)...

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  20. 4 sin theta * cos^(3) theta-4 cos theta * sin ^(3)theta= A)4 cos theta...

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