If `cos A =34,` then ` 32 sin A2 cos (5A)(2)= `A) `sqrt7` B) `-sqrt7` | Class 11 Maths | Doubtnut

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If `cos A =34,` then ` 32 sin A2 cos (5A)(2)=
`A) `sqrt7`
B) `-sqrt7`
C) `7`
D) `-7`

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