the angles.
P P=a2-62 + 2ab , Q=a2+462-6ab, R=62
+6, S =a2 - 4 ab and T=-2 a² +62- abta,
find P+Q+R+SIT.
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Answer:
P+Q+R+SIT
a2-62+2ab+a2+462-6ad+62+6+a2-4ab+(-2a²+62-abta
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