AP and TS EAMCET Engineering Model Paper 5

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Question : 20 of 160

Marks: +1, -0

cos‌θ=a‌cos‌ϕ and sin‌θ=b‌sin‌ϕ then (a2−b2)sin2ϕ=

a2−1
a2
a2+1
−(a2+1)

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