Question

Prove that : (i) sin 38 + sin 22 = sin 82 (ii) cos 100 + cos 20 = cos 40 (iii) sin 50 + sin 10 = cos 20 (iv) sin 23 + sin 37 = cos 7 (v) sin 105 + cos 105 = cos 45 (vi) sin 40 + sin 20 = cos 10

Answer 1

thank you dear....it's correct...