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If in triangle ABC cosA+cosB+cosC=3/2 th...

If in `triangle ABC` cosA+cosB+cosC=3/2 then prove that triangle is equilateral

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CENGAGE PUBLICATION-TRIGONOMETRIC FUNCTIONS-All Questions
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  2. Solution of the equation sin(sqrt(1+sin2theta))=sintheta+costhetai s(n...

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  3. If in triangle ABC cosA+cosB+cosC=3/2 then prove that triangle is equi...

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  4. Let alpha,beta,gamma>0a n dalpha+beta+gamma=pi/2dot Then prove that sq...

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  8. Solve 7cos^2theta+3sin^2theta=4

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  9. If sintheta+costheta=1/5"and"0 le theta ltpi, thentantheta is

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  10. In A B C Prove that cos^2A/2+cos^2B/2+cos^2C/2lt=9/4dot If cos^2A/2...

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  12. Find the number of roots of the equation tan(x+pi/6)=2tanx ,forx in (0...

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  13. In triangle A B C , prove that cos e c A/2+cos e c B/2+cos e c C/2geq...

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