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sin^(2)22^(@)+sin^(2)38^(@)+sin22^(@) si...

`sin^(2)22^(@)+sin^(2)38^(@)+sin22^(@) sin38^(@)=`

A

`1/4`

B

`3/4`

C

`5/4`

D

`1/2`

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-PRACTICE EXERCISE
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  2. cos^(2)25^(@)+cos^(2)35^(@)-cos25^(@) cos35^(@)=

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  3. sin^(2)22^(@)+sin^(2)38^(@)+sin22^(@) sin38^(@)=

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  4. Sin^(2)50^(@)+Sin^(2)70^(@)+Sin^(2)170^(@)=

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  5. sin^(3)20^(@)+sin^(3)40^(@)-sin^(3)80^(@)=

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  10. IF tan^2 theta=2 tan^2 phi +1 then find the value of cos 2 theta+sin^2...

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  11. If x in (45^(@),90^(@)), sin2x=1/2, then sin^(3)x-3/4 sinx=

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  12. If (sin alpha )/(a) = ( cos alpha )/(b) , then a sin 2alpha + b cos 2...

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  13. If log(2)(sinx)-log(2)(cosx)-log(2)(1-tanx)-log(2)(1+tanx)=-1 then tan...

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  15. The angle theta whose cosine is equal to its tangent is given by

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  16. If tan x=(b)/(a) " then " sqrt((a+b)/(a-b))+sqrt((a-b)/(a+b))=

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  17. If alpha is a root of 25 cos^(2)theta + 5 cos theta - 12 =0, (pi)/(2) ...

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  18. A quadratic equation whose roots are tan22 1^(@)/2 and cot22 1^(@)/2 i...

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  19. A quadratic equation whose roots are tan15^(@) and cot15^(@) is

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  20. If xcostheta=ycos(theta+120^(@))=z cos (theta+240^(@)) then xy+yz+zx=

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