Question

seca+tana=xthen prove that sina=x^2-1 /x^2+1​

Answer 1

Answer:

Hope it helps you friend.

Answer 2

in a right triangle ABC right angled at c m is the midpoint of hypotenuse a b c is joined to m and produced to a point d such that DM is equal to CM. d is point to point b c figure 7.3 so that triangle AMC congruence triangle bmd