what is the minimum value of 4sec^2 Ф+9cosec^2 Ф

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yu square evrethang, so both parts gotta be >=0

so me ges min=0

but that mae be 2 harsh

sekant=1/kosine & kosekant=1/sine

sins sine^2 +kosine^2=1, minimun mite be 1 or even bigger
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