indicates which of the following statements are true and which are false reasons for your answer:
a) the angle of 840 is the same within the 60-degree angle
b) within 180 is equal to 1
c) the cosine of an angle is always greater than -1
d) if tg = 3, the angle it mandatory 60



Knowing that cos = -3/5y than 180 < <270 . Calculate the remaining trigonometric ratios of angle .