Question

6) If sin À=3/5
prove that cos A ×tan A +1 = 2 cos A.​

Answer 1

hope this helps u

sin A= 3/5

sin A= opposite / hypotenuse = 3/5

hypotenuse ²=opposite ²+adjacent ²

5²=3²+adjacent ²

adjacent = √5²-3²

              = √25-9

              = √16

adjacent = 4

cos A= adjacent / hypotenuse= 4/5

tan A=  opposite/adjacent = 3/4

cos A ×tan A +1 = 2 cos A.​

4/5 * 3/4+1= 2*4/5

3/5 +1= 8/5

taking l.c.m

3+5/5=8/5

8/5=8/5