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Number of solution of equation 2sinx/2co...

Number of solution of equation `2sinx/2cos^2x-2sinx/2sin^2x=cos^2x-sin^2xforx in [0,4pi]` is (a) 6 (b) 10 (c) 2 (d) 3

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
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  2. Prove that r1+r2+r3-r=4R

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  3. Number of solution of equation 2sinx/2cos^2x-2sinx/2sin^2x=cos^2x-sin^...

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  4. If cot(theta-alpha),3cottheta,"cot"(theta+alpha) are in A.P. and theta...

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  5. If x=sectheta-tanthetaa n dy=cos e ctheta+cottheta, then prove that x...

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  6. If A >0,B >0a n dA+B=pi/3, the maximum value of tanAtanB is

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  7. Prove that cosA+cosB+cosC=1+r/R

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  8. denote the positive solution of the equation 3+3costheta=2sin^2thetado...

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  9. If (sec^4theta)/a+(tan^4theta)/b=1/(a+b), then prove that |b|lt=|a| .

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  10. Prove that: ((cosA+cos B)/(sinA-sinB))^n+((sinA+sinB)/(cosA-cosB))^n={...

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  11. Prove that ("a c o s"A+b cosB+c cosC)/(a+b+c)=r/Rdot

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  12. Find the number of solution of the equation 1+e^(cot^2x)=sqrt(2|sinx|-...

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  13. If a^2+b^2+2a bcostheta=1,c^2+d^2+2c dcostheta=1 and a c+b d+(a d+b c)...

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  14. If r1=r2+r3+r prove that the triangle is right angled .

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  15. Find the number of solution of theta in [0,2pi] satisfying the equati...

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  16. Prove that (cosalpha+cosbeta)^2+(sinalpha+sinbeta)^2=4cos^2((alpha-bet...

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  17. Let A=sinx+cosxdot Then find the value of sin^4x+cos^4x in terms of Ad...

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  18. ABC is an acute angled triangle with circumcenter O and orthocentre H....

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  19. If sintheta=1/2a n dcostheta=-(sqrt(3))/2, then the general value of t...

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  20. In quadrilateral A B C D , if sin((A+B)/2)cos((A-B)/2)+"sin"((C+D)/2)c...

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