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The value of cos10^(@)-sin 10^(@) is...

The value of `cos10^(@)-sin 10^(@)` is

A

positive

B

negative

C

0

D

1

Text Solution

Verified by Experts

The correct Answer is:
A
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ML KHANNA-TRIGONOMETRY RATIOS AND IDENTITIES-MISCELLANEOUS EXERCISE (SELF ASSESSMENT TEST)
  1. The value of cos10^(@)-sin 10^(@) is

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  2. The value of cos 1^@ cos 2^@ cos 3^@…..cos 179^@ is

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  3. If sin x + cosec x =2, then sin^(3n) x + cosec ^(3n) x equals

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  4. Which of the following is correct ?

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  5. If tantheta =-4/3, then sin theta is

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  6. Which of the following number (s) is/are rational?

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  7. tan 75^(@) - cot 75^(@)=

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  8. The value of tan 3A - tan 2A - tan A is equal to

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  9. Prove than tan 56^(@) =("cos " 11^(@) + "sin " 11^(@))/("cos " 11^(...

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  10. tan54^(@) can be expressed as

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  11. If 4 n alpha = pi then the value of tan alpha tan 2 alpha tan 3 alpha ...

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  12. The value of sin(45^(@)+theta) - cos(45^(@)-theta) is

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  13. If sintheta=(-4)/(5) and theta lies in third quadrant, then the value...

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  14. If tan theta = 3 and theta lies in thrid quadrant, then the value of s...

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  15. If sin alpha = 12//13 , ( 0 lt alpha lt pi //2) and cos beta = - ( 3)...

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  16. If theta and phi are angles in the first quadrant such that tan theta ...

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  17. The value of cos ( pi //5) cos ( 2pi //5) cos ( 4pi //5) cos ( 8pi //5...

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  18. sin 20^(@) sin 40^(@) sin 60^(@) sin 80^(@) =(3)/(16)

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  19. The value of sqrt3 cosec20^@-sec20^@ is equal to:

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  20. Givent that pi/2,alphaltpi then the expression sqrt((1-sinalpha)/(1+si...

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