Question

28. If 7 sin 0 + 3 cos = 4,0° 0 < 90°, then find the value UIO.
29. If sec 0 + tan 0 = m and sec 0 - tan = n, prove that mn = 1.
30. If x = a sec 0 + b tan 0 and y = a tan 6 + b sec e, prove that x2 - y2 = a2 - 12.
31. If x = h + a cos 0 and y = k + a sin 0, prove that (x - h)2 + (y - k)2 = a-.​

Answer 1

Step-by-step explanation:

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