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Please I need help.Show full working out. (a) sin x cot x= cos x (b) (1 + tan theta)^2 + (1- tan theta)^2 = 2sec^2theta

  • maths -

    since cot = cos/sin,
    sin cot = sin * cos/sin = cos

    expand the two tan expressions and recall that
    sec^2 = 1 + tan^2

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