exam Maths Puzzle Numerical Ability

Consistent linear equations can be(circle all correct answers)
A.inconsistent
B.independant
C.dependant
D.transient
does someone have an answer?

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exam Other Question

Could someone please help me prove this identity.

1 + tan(squared)x/tan x= 2csc2x

I have tried it a number of times and am not having any luck.

Thank you. Using coordinate geometry, prove the the diagonals of a rhombus are perpendicular.