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If cos^2theta-sin^2 theta = 1/2. Then ta...

If `cos^2theta-sin^2 theta = 1/2`. Then `tan theta`=

A

`-1/sqrt3`

B

`1/3`

C

`1/sqrt3`

D

`-1/3`

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UNITED BOOK HOUSE-HOOGHLY COLLIGIATE SCHOOL-EXERCISE
  1. If x=sqrt(2-sqrt(3)) and x+1/x =k, what is k^2?

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  2. ABCD is a cyclic trapezium having AD||BC. If angleABC = 70^@ then angl...

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  3. If cos^2theta-sin^2 theta = 1/2. Then tan theta=

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  4. If two cubes of length of each side 2sqrt6 cm are placed side by side,...

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  5. If the median of arranging the ascending order of data 8,9,12,17,x+2,...

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  6. Fill in the blanks The interest of Rsfor x years at the rate of x% s...

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  7. Fill in the blanks If a:2 = b:5 = c:8 , then 50% of a = 20% of b=% ...

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  8. The perimeter of two similar triangles are 20 cm and 16 cm respectivel...

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  9. Fill in the blanks If cos (67^@30)xxcosec(22^@30)=tan theta, then th...

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  10. Fill in the blanks The radius of a sphere and that of a right circul...

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  11. The measures of central tendency are Mean, Median and

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  12. The simple interest on a sum of money for 2 years at 4% per annum is R...

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  13. True or false: The compound ratio of ab : c^2 ,bc : a^2 and ca : b^2 i...

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  14. Write True or False The angle in the segment of a circle which is g...

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  15. Write True or False Maximum value of sin theta+ cos theta is sqrt2.

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  16. Write True or False If the length of radius of a right circular cyl...

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  17. Write True or False Mode of the data 2,3,9,10,9,3,9 is 10.

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  18. What is the rate of simple interest per annum, when the interest of so...

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  19. In a joint business Kalu invests ₹ 60,000 for 9 months and Viki invest...

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  20. If x+1/x= sqrt3 , find the value of x^30+x^24+x^18+x^12+x^6+1.

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