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If cos^2A+cos^2B+cos^2C=1,t h e n A B C ...

If `cos^2A+cos^2B+cos^2C=1,t h e n A B C` is (a)equilateral (b) isosceles (c)right angles (d) none of these

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To solve the problem, we need to analyze the given equation \( \cos^2 A + \cos^2 B + \cos^2 C = 1 \) and determine the type of triangle ABC. ### Step-by-Step Solution: 1. **Start with the given equation**: \[ \cos^2 A + \cos^2 B + \cos^2 C = 1 \] ...
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CENGAGE-TRIGONOMETRIC FUNCTIONS-Solved Examples And Exercises
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  13. If sin^(-1)a+sin^(-1)b+sin^(-1)c=pi, then asqrt(1-a^2)+bsqrt(1-b^2)+cs...

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  14. Find the sum of the series cos e ctheta+cos e c2theta+cos e c4theta+ t...

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  15. If tan6theta=p/q , find the value of 1/2(pcosec2theta-qsec2theta)

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  19. Eliminate x from equation sin(a+x)=2b and "sin"(a-x)=2c dot

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