Find the volume of the shaded figure by subtracting the smaller volume from the larger

a.

b.

Step-by-step explanation:

a.

Where,

Where,

Volume of the shaded figure =

b. expressed in factored form:

Look for the term that is common to 9a³ and 9ab², then take outside the parenthesis.

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

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