(((2(cos(a-270°))^2)/(sin(a+90°))^(-2) -1)+((2(sin(a-90°))^2)/(cos(a+270))^(-2) -1))...

Question

(((2(cos(a-270°))^2)/(sin(a+90°))^(-2) -1)+((2(sin(a-90°))^2)/(cos(a+270))^(-2) -1))
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Answer 1

I hope this helps you

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