Question

if tan theta + sin theta equals to M and tan theta minus sin theta equals to N in show that M²-N² =4√mn​

Answer 1

Answer:

Solution is in the attachment

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Answer 2

Let that theta=$

then

tan$+sin$=M

tan$-sin$=N

M^2-N^2=(tan$+sin$)^2-(tan$-sin$)^2

=4tan$sin$.

what is m and n is not detailed here so it can be done to this.