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sin(0) = 0, sin(90) = 1, sin(180) = 0, sin (270) = -1

cos(0) = 1, cos(90) = 0, cos(180) = -1, cos (270) = 0

tan(0) = 0, tan (180) = 0.

cosec(90) = 1, cosec(270) = -1

sec(0) = 1, sec(180) = -1

cot(90)= 0, cot(270) = 0

The rest of them:

tan(90), tan (270)

cosec(0), cosec(180)

sec(90), sec(270)

cot(0), cot(180)

are not defined since they entail division by zero.

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11y ago

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