Find the general solutions of the following equation: `sin3theta+cos2theta=0`

Explanation

Given,`sin3theta+cos2theta=0`

⇒ `cos2theta=−sin3theta
`

⇒ `cos2theta=−cos(π/2​−3theta) `


⇒ `cos2theta=cos(π−(π/2​−3theta)) `

⇒` cos2theta=cos(π/2​+3theta)`


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