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Complex number simplification. Confused how to solve. Please help

Complex number simplification. Confused how to solve. Please help

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Grade:12th pass

2 Answers

ankit
14 Points
5 years ago
conver in sin ,cos in half angle then use elopenential from of complex no , its quite easy try once ,
Amit
405 Points
5 years ago
First leave one aside and take out i common from sinπ/8 +icosπ/8.. same do it in denominator. Then write cosπ/8-i sinπ/8 in e^i(-π/8).. do it similarly in denominator.. then multiply and divide by 1+ e^iπ/8 . And just simplify to get answer as -1.

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