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find the number of solutions of the equation 2sin 2 A+sin 2 2A=5 IN THE INTERVER

find the number of solutions of the equation 2sin2A+sin22A=5 IN THE INTERVER

Grade:11

1 Answers

Anil Pannikar AskiitiansExpert-IITB
85 Points
13 years ago

Dear Kiran,

 

sin2A = 2sinAcosA

so, given eq becomes,  sin4A-6sin2A+5=0

sinA = +1 and -1

2 sol.

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Askiitians Expert

Anil Pannikar

IIT Bombay

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