This is the first part of the solutions of exercise 25 of class 10 mathematics (koshe dekhi 25 / class 10 maths chapter 25 ) in Bengali . The name of this chapter is Trigonometric Ratios of Complementary angle. This tutorial is for wbbse students of class 10. This video contains is basic concepts and questions no. 1 to question no. 5. Other parts of this chapter 25 is also available on this channel.
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