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if sin^2theta=1/2 ,then find cos^2theta....

if `sin^2theta=1/2 ,then find cos^2theta`.

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`cos^2 theta=1/2`
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NAVNEET PUBLICATION - MAHARASHTRA BOARD-PRACTICE QUESTIONS BASED-TRIGONOMETRY
  1. Find the value of sin ^2 30^@ +cos^@ 45^@ .

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  2. Fill in the blanks : (i) sin 32^@= cos ……….. (ii) tan 40^@xxtan……...

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  3. if sin^2theta=1/2 ,then find cos^2theta.

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  4. With the help of the given figure , find tan thetaxx tan(90-theta) .

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  5. In the figure , find sin N , cos N, tan W and sin W.

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  6. If cos (40+x)^@ =sin 30^@, find the value of x.

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  7. If sin (A+20)^@ =sqrt(3)/(2) , then find the value of A .

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  8. If sin A cos A =1/2, A is the acute angle , then find the value of A .

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  9. Find the value of sin^2 30^@+cos^2 60^@+tan^2 45^@ .

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  10. Find the value of 2 tan^2 45^@ +cos^2 30^@-sin^2 60^@.

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  11. If sin theta=(11)/(61) then find cos theta.

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  12. If sin theta=(7)/(25) and cos theta=(24)/(25) , then find tan theta.

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  13. Find the value of sin theta xxcos (90-theta) +cos thetaxx sin (90-th...

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  14. Find the value of (cos 56^@)/(sin 34^@) .

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  15. If cos theta=(15)/(17) , then find sin theta .

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  16. Find the value of (tan 60^@)/(sin 60^@ +cos 60^@) .

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  17. If tan theta =1 then find the value of theta and sin theta .

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  18. Find sin 20^@ -cos 70^@ .

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  19. Find the value of (sin 15^@)/(cos 15^@) xxtan 75^@.

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  20. Find the value of sin theta, 6 cos^2 theta =4"" 1/2.

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