13. What function is defined to be the ratio of the opposite side to the hypotenuse? A. sine B. secant C. cosine D. tangent 14. What function is the reciprocal of cosine? A. sine B. secant C. cosine D. tangent 15. What function is the ratio of the opposite side to the adjacent side? A. sine B. secant C. cosine D. tangent 16. Which pair of functions are NOT reciprocal functions? A. sine & cosecant B. sine & cosine C. tangent & cotangent D. cosine & secant 17. What is the function of the reciprocal of cosecant? A. sine B. secant C. cosine D. cosecant 8. What is the value of cos 30 ° ? A. 1/2 B. frac square root of 22 C. frac square root of 32 D. 1
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