Math, asked by satyajitbiswaljune, 6 months ago

if tan 7theta× tan 2theta = 1 then the value of theta??

Answers

Answered by Mohibwallah
2

Step-by-step explanation:

:=cos9theta-cos5theta=cos9theta+cos5theta

:cos5theta=0

;theta=2nπ/5+- π/10

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