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If A=sin^(2)theta+cos^(4)theta, then fin...

If `A=sin^(2)theta+cos^(4)theta`, then find all real values of `theta`.

A

`alt1/2`

B

`age1/2`

C

`1/2lea le1`

D

`age0`

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS AND IDENTITIES-Chapter Test
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  13. If tantheta + tan(theta + pi/3) + tan(theta-pi/3)= Ktan3theta, then K ...

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  14. If cos(theta + phi) = m cos (theta - phi), then tan theta is equal to ...

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  15. alpha & beta are solutions of a cos theta+b sin theta=c(cosalpha != ...

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  16. Let n be a positive integer such that sinpi/(2n)+cospi/(2n)=(sqrt(n))/...

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  17. cos^(4)theta-sin^(4)theta is equal to

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  18. If tanalpha=(m)/(m+1) and tanbeta=(1)/(2m+1), then alpha+beta is equa...

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  19. Prove that: t a nalpha+2tan2alpha+4tan4alpha+8cot8alpha=cotalpha

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  20. If cos theta-4sintheta=1, the sintheta+4costheta=

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