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Evaluate \(\int_3^7\)sin(t)-2cos(t)dt.(a) cos(7) – 2sin(7) + (cos(3) + 2sin(3)(b) -17(c) 12(d) cos(7) – 2sin(7) – (cos(3) + 2sin(3)I have been asked this question during an interview.Question is taken from Definite Integral topic in portion Integrals of Mathematics – Class 12

Answer» RIGHT CHOICE is (d) cos(7) – 2sin(7) – (cos(3) + 2sin(3)

Best EXPLANATION: \(\int_3^7\)sin(t)-2cos(t)dt = (cos(t)−2sin(t))^73

= (cos(7) – 2sin(7)) – (cos(3) – 2sin(3))

= cos(7) – 2sin(7) – (cos(3) + 2sin(3)


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