Question

QUESTION 21 3. The cofunction value of col(50" + x) is: O Cot(40° + x) Ob tan(40" + x) Ootan(40" - x) is: d. none of the above QUESTION 22 8. Find the distance, s. (to the nearest foot) a point travels along a circle in 2 minutes, if the angular speed W Зr rad cor and radius 2.4 feet. a. 45 ft b. 339 ft O c. 679 ft O d. none of the above QUESTION 23 22. To the nearest degree, find the direction angle of the vector V=(-4,-3). 020-217° Ob. =221° Oce=229 d. none of the above

Answer 1

3. The cofunction value of Cot (50 +x) = tem {96 – (50 +27] since 1. We know; 'ento = tan (96-0). ... 2. we can write . tain (90 - (50 +x)} = tan (90 - 50°-2) teni (40° -*) : The cofunction value of Cot ( 50°+2) is ton (40°-2) 7-e. option (e) is the right answer. 8. We know, . distince (S)'s oro.. where; r-radius and Orangular speed x rotation .. time. Here, r= 2:4 feet. a circle in travels and a point, along & minutes.

is ele o = 3.1 x 120 (1: Qmin. s120sec.) = 311x30 = 90T feet. Distance (8) = 2:489017 = 678.5 feet. = 679 feet So, the required distance is 679 feet. Thus, option () is the right answer. 522. Here, Given that , V= (-4,-3). So, w, 2-4, V2=23 we know, the direction angle, tano vi to : tano = 23 - temo = 24 7 p = fan (2) :0 - 2170 So option (a) is the right answer.