What is the right choice for question 39) ?

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The 3 basic trigonometric functions are: sine, cosine, and tangent.

The reciprocal of sine is: `1/sin x = csc x`

csc = cosecant

The reciprocal of cosine is: `1/cosx = sec x`

sec = secant

The reciprocal of tangent is: `1/tanx = cot x`

cot = cotangent

**Therfore the 3 reciprocals are: secant, cosecant, and cotangent = choice"d"**

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