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

`Sin^(2)50^(@)+Sin^(2)70^(@)+Sin^(2)170^(@)=`

A

`1/2`

B

1

C

`3/2`

D

2

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-PRACTICE EXERCISE
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  2. sin^(2)22^(@)+sin^(2)38^(@)+sin22^(@) sin38^(@)=

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

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  5. cos^(4)alpha+sin^(4)alpha-6sin^(2)alpha cos^(2)alpha=

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  6. If cos^(6) theta + sin^(6) theta + k sin^(2) 2theta=1 , then k=

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  7. sin 3 theta * cos^(3) theta + cos 3 theta * sin^(3) theta =

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  8. tan2alpha-tanalpha(1+sec2alpha)=

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

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

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

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

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  13. tantheta+2tan2theta+4tan4theta+8tan8theta 16tan16theta+32cot32theta=

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

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