exam Maths Puzzle Numerical Ability

Rewrite in terms of csc x: (1/(1-cos x))-((cos x)/(1+cos x))

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exam Other Question

add -5+23 Solve the Inequalities.

1. 4x-3≤17

2. 2y-9>5y+12

3. -8<3x+4<22

4. 3x-5<-11 or 2x-3>3