exam Maths Puzzle Numerical Ability

write in standard form. state wheather the graph is a parabola, circle,ellipse, or hyperbola. and graph the equation...?


6x^2+ 6y^2=162

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exam Other Question
a.(1-tan^2u)/(1+tan^2u)=cos(2u)
I think this is a half angle identity?verify the identity.


b. compare the graphs of y1=(1-tan^2u)/(1+tan^2u) and y2=cos(2u) Please help me Form A linear equation in two variables and help me Discuss the slope or rate of change