exam Maths Puzzle Numerical Ability

sin(-x)/sin(∏ + x)- tan(∏/2 + x)/cot x + cos x/sin(∏/2 + x) = 3

can you please solve this, it would be really appreciated. Thanks

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exam Other Question

find three consecutive even integers such that four times the second is eight less than the third. which one of the following geometric forms is a curved surface.
A. side of a cone
B. side of a pyramid
C. Base of a cylinder
D. Base of a Prism