8. Value of sin(-4209 cos(3909 + cos(-6609 sin(3309)
is :-
3
(1) 0
(2)-1
(3) O
(4)
2
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Answered by
3
Step-by-step explanation:
sin(-420).cos(390) + cos(-660).sin(330)
-sin(420).cos(390) + cos(660).sin(330)
-sin(360+60).cos(360+30) + cos(2.360 - 60).sin(360-30)
-sin(60). cos(30) - cos(60).sin(30)
-3/4 -1/4
-1
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1
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