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If sinA+sinB+sinC=3, then the value of c...

If `sinA+sinB+sinC=3`, then the value of `cosA+cosB+cosC` is equal to

A

3

B

2

C

0

D

1

Text Solution

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The correct Answer is:
C
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PATHFINDER-BASIC MATHEMATICS-QUESTION BANK
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  3. If sinA+sinB+sinC=3, then the value of cosA+cosB+cosC is equal to

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  4. If theta in (-pi, 2 pi) then the interval in which cos theta gt0 is

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  6. If sqrt(1-sinA)= "sin" A/2-"cos" A/2, then A/2 - pi/4 could lie in qua...

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  7. Prove that tan 1^@ tan 2^@ tan 3^@........ tan 88^@tan89^@=1

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  8. Prove that sin10^@+sin20^@+sin30^@+.........+sin360^@=0

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  9. Prove that tanAcdottan(A+60^@)+tanAcdottan(A-60^@)+tan(A+60^@)tan(A-60...

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  10. If the angle theta be divided into two parts such that the tangent of ...

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  11. If cos theta+ cos^2 theta=1, prove that sin^12 theta+3sin^10 theta+3s...

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  14. Evaluate : lim(xrarr0) (sin(1+x)-sin(1-x))/x

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  15. Evaluate : lim(xrarr0) (tanx-sinx)/x^3

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  16. Differentiate the following functions w.r.t.'x' : cossqrt((x^2+3x+4)...

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  17. Differentiate the following functions w.r.t.'x' : (xsin^-1x)/(sqrt(1...

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  18. Differentiate the following functions w.r.t.'x' : log (sin (logx))

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  19. Differentiate the following functions w.r.t.'x' : e^(3sqrtax)

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  20. Find dy/dx: y=(tanx)^(cotx)+(cotx)^(tanx)

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