Grade 11IIT JEE Entrance Exam
if z=sinθ+icosθ then find z²+1/z²a)-2cos(π-2θ)b)2cos(π-2θ)c)2sin(π-2θ)d)-2sin(π-2θ)
if z=sinθ+icosθ then find z²+1/z²
a)-2cos(π-2θ)
b)2cos(π-2θ)
c)2sin(π-2θ)
d)-2sin(π-2θ)
1 Answer
Sourabh Singh
it is nothing but (z+ 1/z )2 -2 .
Just find this value and you will get the answer
Just find this value and you will get the answer
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