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If sintheta(1)+sintheta(2)+sintheta(3)=3...

If `sintheta_(1)+sintheta_(2)+sintheta_(3)=3, then cos theta_(1)+cos theta_(2)+cos theta_(3)=`

A

3

B

2

C

1

D

0

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The correct Answer is:
D
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OBJECTIVE RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS AND IDENTITIES-Exercise
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  3. If sintheta(1)+sintheta(2)+sintheta(3)=3, then cos theta(1)+cos theta(...

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  4. If A lies in the third quadrant and 3 tan A-4 = 0, then 5 sin 2A + 3si...

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  7. If A+B+C=(3pi)/2, t h e ncos2A+cos2B+cos2C is equal to 1-4cos Acos Bc...

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  8. If A+C=B,then tanA tanBtanC=

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  9. If tan(cotx)=cot(tanx), then sin2x is equal to

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  10. If tan theta=a/b then b cos 2theta+asin 2theta=

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  11. If A=130^(@)and x=sinA+cosA, then

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  12. The value of the expression |vecaxxvecb|^(2)+(veca.vecb)^(2) is….. .

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  13. If A=sin^(2)theta+cos^(4)theta, then find all real values of theta.

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  14. about to only mathematics

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  15. Which of the following statement is incorrect

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  16. The value of sin(pi/14)sin((3pi)/14)sin((5pi)/14) is

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  17. If sintheta+cosectheta=2, then "sin"^(2)theta+"cosec"^(2)theta is equa...

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  18. If tantheta=(1)/(2) and tanphi=(1)/(3), then the value of theta+phi i...

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  19. If sinx+sin^2x=1, then find the value of cos^(12)x +3cos^(10)x + 3 cos...

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  20. Write the maximum value of 12 sintheta-9sin^2\ \ thetadot

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