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प्रश्न
Solve for x : cos `(x/(2)+10°) = (sqrt3)/(2)`
उत्तर
cos `( x/2 + 10°) = (sqrt3)/(2)`
cos `( x/2 + 10°)` = cos 30°
`(x)/(2)` + 10° = 30°
x = 40°
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