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If z=costheta +isintheta, prove that

  1. If z=costheta +isintheta, prove thata) z = 1/z b) z+1/z = 2costheta c) z-1/z=2isintheta Hence ,deduce that z^2-1/z^2
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    2. Dani asked by Dani
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  2. 1. The complex number 'a' is such that a^2=5-12iuse an algebraic method to find the two possible values of 'a' 8. The complex
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    2. Kerry-Ann asked by Kerry-Ann
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  3. Prove the equation is an identity :csc3theta - csctheta + cottheta/csctheta = cotsqtheta + costheta wow ... try that one
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    2. Don asked by Don
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  4. A 5.0kg box slides 8.0m down a ramp, inclined at 40degrees from the horizontal. If the box slides at constant velocity, the work
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    2. Anonymous asked by Anonymous
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  5. if cottheta=7/8 then what is the value of 1+costheta/1-sintheta*1-costheta/1+sintheta.
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    2. vignesh asked by vignesh
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  6. Given seccant of thata = 3, use trigonometric identities to find the exact value ofa- Cos thata b- tan squre of thata c csc (90
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    2. Josh asked by Josh
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  7. Find costheta=-1
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  8. 4 costheta +3sintheta=5,4sintheta-3costheta=WHAT
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    2. popy asked by popy
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  9. What are the eccentricity and the distance of the directrix of 4/-2-costheta?
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    2. Donald Blake asked by Donald Blake
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  10. can you explain how you find the eccentricity of r=4/-2-costheta?
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    2. Anonymous asked by Anonymous
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