cos 3a (2sin 2a-1)=0
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Answered by
8
Answer:
cos3A.(2sin2A−1)=0
cos3A=0 or 2sin2A=1
3A=90 or 2A=30
A=30∘ or A=15∘
Thus, A=30∘,15∘
Step-by-step explanation:
Answered by
4
cos 3a = 0
sin (90-3a) = 0
3a = 90
a = 90/3 = 30
2sin2a = 1
2a = 1/2 = 30
a = 30/2 = 15
Answer us : 15 and 30
HOPE IT HELPS YOU!!!
sin (90-3a) = 0
3a = 90
a = 90/3 = 30
2sin2a = 1
2a = 1/2 = 30
a = 30/2 = 15
Answer us : 15 and 30
HOPE IT HELPS YOU!!!
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