if sec 4a=cosec(a-20) find the value of a square
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Answer:
if sec 4a=cosec(a-20) find the value of a square
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Answer:
sin(A−20
0
)=cos(4A)
sin(A−20
0
)=sin(90
0
−4A)
Hence
A−20
0
=90
0
−4A
5A=110
0
A=22
0
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