1. Express the following in terms of ratios of positive angles which are less than 450
(a) sin(- 70°).
(b) cos (- 65°).
(c) tan 155°
(d) sin 172°
(e) cos 375°
(f) tan (-2349)
(g) cosec 843°.
(h) sec (- 928°).
(i) cot 1145
following
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