If sin x + cosec x = 2, then sin19x + cosec20 x =
  • a)
    219
  • b)
    220
  • c)
    2
  • d)
    239
Correct answer is option 'C'. Can you explain this answer?

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Answers

Here is the solution to your question:

Anurag Singh
Jan 31, 2021
Sin19+cosec20
so according to rule
sin=1/cosec
1/cosec19+cosec20
by rules of division
cosec(-19+20) =2
ans=2

Here is the solution to your question:sin x + cosec x = 2So, Answer is Option CP.S. You can understand all the concepts of Class 10 Trigonometry by going through the chapters:Introduction to Trigonometryhttps://edurev.in/courses/643_mathematics--maths--class-10-videos--docs--mcqs?chapter=651Some Application of Trigonometryhttps://edurev.in/courses/643_mathematics--maths--class-10-videos--docs--mcqs?chapter=652
Here is the solution to your question:sin x + cosec x = 2So, Answer is Option CP.S. You can understand all the concepts of Class 10 Trigonometry by going through the chapters:Introduction to Trigonometryhttps://edurev.in/courses/643_mathematics--maths--class-10-videos--docs--mcqs?chapter=651Some Application of Trigonometryhttps://edurev.in/courses/643_mathematics--maths--class-10-videos--docs--mcqs?chapter=652