If cos 2 theta=½ , find sin theta=?
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cos 2 theta =1/2
cos 60= 1/2
2 theta= 60
theta=30
sin theta= sin 30= 1/2
cos 60= 1/2
2 theta= 60
theta=30
sin theta= sin 30= 1/2
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theta is written as @
cos 2@=1/2
cos2@=cos69
2@=60
@=60/2
@=30°
than
sin30°=1/2
cos 2@=1/2
cos2@=cos69
2@=60
@=60/2
@=30°
than
sin30°=1/2
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