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If sintheta1+sintheta2+sintheta3=3, then...

If `sintheta_1+sintheta_2+sintheta_3=3,` then `costheta_1+costheta_2+costheta_3` is equal to

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CENGAGE PUBLICATION-TRIGONOMETRIC FUNCTIONS-All Questions
  1. In A B C , on the side B C ,D and E are two points such that B D=D E=...

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  2. Column I Column II In A B C , if cos24+cos2B+cos2C=-1 then we can ...

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  3. If sintheta1+sintheta2+sintheta3=3, then costheta1+costheta2+costheta3...

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  4. Number of integral values of a for which the equation cos^2x-sinx+a=0 ...

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  5. It cos(alpha+beta)=4/5,sin(alpha-beta)=5/(13)and alpha,beta lie betwee...

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  6. A circle of radius 4cm is inscribed in A B C , which touches the side...

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  7. If sin^2theta=(x^2+y^2+1)/(2x) , then x must be -3 (b) -2 (c) 1...

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  8. If cos4x=a0+a1cos^2x+a^2cos^4x is true for all values of x in R , the...

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  9. If A B C ,sinC+cosC+sin(2B+C)-cos(2B+C)=2sqrt(2.) Prove that A B C ...

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  10. In a triangle ABC,angleC=90^@, r and R are the inradius and circumra...

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  11. Suppose ABCD (in order) is a quadrilateral inscribed in a circle. Whic...

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  12. Solve sec4theta-sec2theta=2

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  13. Prove that sum(r=1)^n(1/(costheta+"cos"(2r+1)theta))=(sinntheta)/(2sin...

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  14. ABC is an isosceles triangle inscribed in a circle of radius rdot If A...

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  15. Find which of the following functions is even or odd ? f(x)=x^2+|sinx|...

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  16. Solve : 5cos2theta+2cos^2(theta/2)+1=0,-pi lt theta lt pi

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  17. If x^2+y^2=x^2y^2 then find the range of (5x+12 y+7x y)/(x y) .

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  18. In triangle A B C , if cosA+cosB+cosC=7/4, t h e n R/r is equal to 3/4...

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  19. If 3tanA+4=0, then the value of 2cotA-5cosA+sinA is equal to

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  20. Solve sin2theta+costheta=0

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