a) A (- 4, -1), B( -1 , 2 ) and C ( p, 5 ) are the vertices of an isosceles triangle. Find the value of p,
given that AB is the unequal side.
(b) Simplify: If x = a cos + b sin and y = a sin θ - bcos , prove that x2 + y2 = a2 + b2.
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simplify: a cis+ 2y+2y+2y
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