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The value of (cos 1^(@) +cos 2^(@) +cos ...

The value of `(cos 1^(@) +cos 2^(@) +cos 3^(@)+…+cos 180^(@))` is -

A

`sqrt2`

B

`1`

C

`-1`

D

0

Text Solution

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The correct Answer is:
C
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 3
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  2. The number of solutions of tan x+ sec x=2 cos x in (0, 2pi) is

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  4. If cos (x-y)+1=0, then the value of (cos x+ cos y) and (sin x+sin y) i...

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  5. The measures of the sides of a triangle are 3,5 and 7 then the greates...

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  7. If cos A = 1/7 and cos B =""13/14 where A and B both are acute angles,...

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  8. (sec 50^(@)+tan 50^(@)) is equal to-

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  9. The value of cosec ^(2) theta cot ^(2) theta - sec ^(2) theta tan ^(2)...

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  10. If the angles of a triangle are in the ratio 4:1:1, then the ratio of ...

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  11. If pi lt A lt (3pi)/(2) and tan A""=4/3, then the value of (5 sin 2A +...

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  12. The maximum value of (4 sin ^(2)x + 3 cos ^(2) x) is-

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  13. If sin 6 theta =32 cos ^(5) theta sin theta -32 cos ^(3) theta sin the...

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  14. If w=x+y+z then (sin x+ sin y+ sin z- sin w) is equal to-

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  15. If sin theta + cos theta = m and sin ^(3) theta + cos ^(3) theta =n, s...

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  16. If alpha =(pi)/(18) radian then the value of (cos alpha + cos 2 alpha+...

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  18. In a triangle ABC if b=2, B=30^(@), then the area of the circumcircal ...

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  20. If tan theta + sec theta=4, then the value of sin theta (0 lt theta l...

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