exam Maths Puzzle Numerical Ability

(cos250*cos25) + (sin250*sin25)

a.k.a. (the cosine of 250 degrees multiplied by the cosine of 25 degrees) plus (the sine of 250 degrees multiplied by the sine of 25 degrees)

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exam Other Question
How do you solve 3(2x+5)=39? In right triangle ABC, m<B=90, AB=5, and AC=12 Find BC round to the nearest tenth, if necessary