sec^4 θ - cos^4θ = 1- 2 cos^2 θ
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How do I prove the above?
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please write in paper
Vedikaaaa:
okay
umm, how do i send a pic? im new at this
o sorry I can't help
okay, uh- didnt you understand my ques? it's secant raised to four theta - cosecant raised to four theta = 1 - 2 × cosecant raised to 2 theta
how do i prove it?
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