CBSE Class 12-science Answered
solve it
Asked by sahrudadayajena | 27 Jan, 2024, 21:11: PM
Expert Answer
Let α = ( sin4θ - cos4θ + 1 ) cosec2θ
α = [ ( sin2θ - cos2θ ) ( ( sin2θ + cos2θ ) + 1 ] cosec2θ
Since ( sin2θ + cos2θ ) =1 , above expression is written as
α = [ sin2θ - cos2θ +1 ] cosec2θ
Since ( 1 - cos2θ ) = sin2θ , above expression is written as
α = [ 2sin2θ ] cosec2θ
since cosecθ = 1 / sinθ , above expression becomes
α = 2
Answered by Thiyagarajan K | 28 Jan, 2024, 12:38: PM
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