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solve the equation cosx + cos3x …

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solve the equation cosx + cos3x - 2 cos2x =0
  • 4 answers

S ? George ☺☺ 5 years, 10 months ago

tanxx neeraj bhai

Rohit Sahani? 5 years, 11 months ago

Yrr mera maths bhtt weak hai

Rohit Sahani? 5 years, 11 months ago

Maths student

Neeraj Tyagi 5 years, 11 months ago

Apply formula between cosx+ cos3x and then take common from whole question. Then take factors eyual to zero
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