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a.- 1. Evaluate without use of a calculator sin(-x)sec(-x)tan(180-x) sec(360-x)cos(2700-x)tan(1800-x) b.- 2sin(-x) 'sin(1800x) cot(-x) sin(90+x) - + c.5tan570.cos750-cosec405.cos(-675) 6tan(90-x) cos(180-x)

a.- 1. Evaluate without use of a calculator sin(-x)sec(-x)tan(180-x) sec(360-x)cos(2700-x)tan(1800-x) b.- 2sin(-x) 'sin(1800x) cot(-x) sin(90+x) - + c.5tan570.cos750-cosec405.cos(-675) 6tan(90-x) cos(180-x)

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