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sin^(2)17.5^(@) + sin^(2)72.5^(@) is equ...

`sin^(2)17.5^(@) + sin^(2)72.5^(@)` is equal to

A

`tan ^(2) 45^(circ)`

B

`cos ^(2) 90^(circ)`

C

`sin ^(2) 45^(circ)`

D

`cos ^(2) 30^(circ)`

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
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  2. From an aeroplane flying, vertically above a horizontal road, the ange...

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  3. sin^(2)17.5^(@) + sin^(2)72.5^(@) is equal to

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  8. In a triangle ABC, if (cos A)/(a) = (cos B)/(b)= (cos C)/(c ) and a=2 ...

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  9. 3(sinx-cosx)^(4)+6(sinx+cosx)^(2)+4(sin^(6)x+cos^(6)x)=

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  10. The number of values of x in the interval [0,5pi] satisfying the equat...

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  11. In a triangle PQR, /R = pi//2, If tan(P//2). and tan(Q//2) are the roo...

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  12. The maximum value of : (cosalpha(1)).(cosalpha(2))....(cosalpha(n)) un...

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  13. A man from the top of a 100 metres high lower sees a car towards the t...

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  14. If 0ltthetalt2pi, then the intervals of values of theta for which 2sin...

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  15. Given A=sin ^(2) theta+cos ^(4) theta then for all real theta

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  16. (3 cos theta+cos 3 theta)/(3 sin theta-sin 3 theta)=

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