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cos105^(@)+sin105^(@) = …………...

`cos105^(@)+sin105^(@)` = …………

A

`(1)/(2)`

B

1

C

`sqrt(2)`

D

`(1)/(sqrt(2))`

Text Solution

Verified by Experts

The correct Answer is:
D
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Evaluate sin 60^(@) cos 30 ^(@) -sin 30^(@) cos 60 ^(@) , What is the value of sin (60^(@) -30 ^(@) ) What can you conclude ?

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Show that cos 36^(@) cos 54 ^(@) -sin 36^(@) sin 54^(@) =0

(sin(70^(@))+cos(40^(@)))/(cos(70^(@))+sin(40^(@)))= ..........

Is it right to say that cos ( 60^(@) + 30 ^(@) ) = cos 60^(@) cos 30 ^(@) -sin 60^(@) sin 30 ^(@)

Find the value of : (i) sin 30^(@)+cos 60^(@) (ii) sin 0^(@)-cos 0^(@) (iii) tan 45^(@)- tan 37^(@) (iv) sin 390^(@) (v) cos 405^(@) (vi) tan 420^(@) (vii) sin 150^(@) (viii) cos 120^(@) (ix) tan 135^(@) (x) sin (330^(@)) (xi) cos 300^(@) (xii) sin (-30^(@)) (xiii) cos (-60^(@)) (xiv) tan (-45^(@)) (xv) sin (-150^(@))

If y=5 (sin 100^(@)cos 27^(@) +cos 100^(@)sin 27^(@)) the value of y is :-

The value of cos(480^(@))sin(150^(@))+sin(600^(@))cos(390^(@)) is ………….

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KUMAR PRAKASHAN-TRIGONOMETRIC FUNCTIONS -TEXTBOOK BASED MCQS
  1. Out of the following statement which is false?

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  2. If tantheta+sintheta=mandtantheta-sintheta=n then m^(2)-n^(2) = …………

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  3. cos105^(@)+sin105^(@) = …………

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  4. If A+B=225^(@) then (cotA)/(1+cotA).(cotB)/(1+cotB) = ………….

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  5. If y=(1+tanA)(1-tanB)andA-B=(pi)/(4) then (y+1)^(y+1) = …………

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  6. sin^(2)((pi)/(8))+sin^(2)((3pi)/(8))+sin^(2)((5pi)/(8))+sin^(2)((7pi)/...

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  7. (cos(17^(@))+sin(17^(@)))/(cos(17^(@))-sin(17^(@)))= …………

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  8. (sin(70^(@))+cos(40^(@)))/(cos(70^(@))+sin(40^(@)))= ..........

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  9. sin(12^(@))sin(48^(@))sin(54^(@))= ………..

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  10. The value of (1-tan^(2)(15^(@)))/(1+tan^(2)(15^(@))) is ………..

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  11. The value of (1-tan^(2)15^(@))/(1+tan^(2)15^(@)) is

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  12. cos^(2)(7(1^@)/(2))-cos^(2)(37(1^(@))/(2))= …………

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  13. The value of cos(480^(@))sin(150^(@))+sin(600^(@))cos(390^(@)) is …………...

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  14. cos((2pi)/(7))+cos((4pi)/(7))+cos((6pi)/(7))=

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  15. If (tanx)/(1)=(tany)/(2)=(tanz)/(3)(ne0)andx+y+z=pi then which of the ...

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  16. cos((pi)/(7))cos((2pi)/(7))cos((4pi)/(7))= ………..

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  17. sin((pi)/(16))sin((3pi)/(16))sin((5pi)/(16))sin((7pi)/(16))= ………..

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  18. cos^(2)((pi)/(12))+cos^(2)((3pi)/(12))+cos^(2)((5pi)/(12))= …………

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  19. If A=125 and x=sinA^(@)+cosA^(@) then ………..

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  20. The value of sqrt(3)cosec20^(@)-sec20^(@) is …………

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