-->

Problem 2

2. Without using calculator , find the value of

${\color{Red}(a) sin 420^0 , cos 390^0 , - cos (-300^0). sin (-330^0)}$

${\color{Red}(b) sin 150^0 + cos 300^0 - tan 315^0 + sec (3660^0)}$
${\color{Red} (c) sin 495^0 + sin (-225^0) + sin (405^0) - cos (225^0)}$

${\color{Red} (d) cos 225, cos 675 , - sin 285 , sin 315}$

${\color{Red} (e) cos 30 + sin 240 + tan 68 - tan (-120)}$

You are here