exam Maths Puzzle Numerical Ability

please help me Indicate whether the problem is true or false show how you got it sin25 degrees = sin155 degrees

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exam Other Question
-2x^2+x+8=0 write the related function in vertex form, use the quadratic formula to find the roots and graph the parabola find all roots of f(x)=2x^4-17x^3+49x^2-23x-91, given that 7/2 and -1 are roots


Find a polynomial with zeros of 2-3i and -3+5i ( and actually multiply it out)


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