exam Maths Puzzle Numerical Ability

Using a calculator, find the value of cot (-414 degrees) to four decimal places.

a.-0.7265
b.-9.5143
c.-1.3764
d.-2.2460

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exam Other Question

A line having an x-intersept of 4 and passing through the point(-2, -6). given that cos@=1/4, and @ is in Quadrant IV, find the exact value for sin 2@, cos 3@, and tan @/2.