self Maths Puzzle

if A and B are the complementary angles, then the value of sinA cosB + cosA sinB - tanA tanB + sec^2A - cot62B is

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self Other Question

pand q are the two points observed from the top of a building 10root3 m high.if the angle of depression of the points are complementary and pq=20 m then the distance of p from the buildling? If x sin^3 theta +y cos^3 theta+sin theta cos theta and xsin theta +y cos theta, sin theta is not equal to 0,cos theta is not equal to zero,then x^2 + y^2 is