exam Maths Puzzle Numerical Ability

please Indicate whether the problem is true or false but show all work thanks
sin 0(with a dash through it) = cos (90-0(with a dash through it))

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exam Other Question

t^2-24-10t
(t+?)(t-?)
I have tried -10,1..-1,10..2,-5......5,-2...... I believe this is prime.
would you jsut check behind me please?
Thank you Dianne
RATIOS: Write the ratio in simplest form comparing the area of the smaller rectangle to the area of the larger rectangle.

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