Solve theeta
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4
we have,
cos²¢+cos¢ = 0
cos¢(cos¢+1) = 0
cos¢ = 0 and cos¢+1 = 0
cos¢ = cos90 and cos¢ = -1 = cos180
so,, ¢ = 90,180 ....ans.
Answered by
1
see the solution in photo
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