Question: .2 Simplify completely: sin2 (90+a)+sin(180 +a)sin (-a) sin1800-tan135

.2 Simplify completely: sin2 (90+a)+sin(180 +a)sin (-a) sin1800-tan135

.2 Simplify completely: sin2 (90+a)+sin(180 +a)sin (-a) sin1800-tan135

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