Ncert class 10 maths trigonometry exercise 8.1 July 8, 2019 16 32 64 128 Ncert class 10 maths trigonometry exercise 8.1 solutions Trigonometry class 10 Class 10th chapter trigonometry exercise 8.1 question number 8 Chapter trigonometry class 10 ex 8.1 Math trigonometry class 10