Question

prove tan2theta - 1/cos2theta +1 = 0, please show steps​

Answer 1

Step-by-step explanation:

LHS

1+tan²∅ -1/cos²∅

sec²∅-sec²∅ ( sec²∅-tan²∅=1 ,

sec²∅=1/cos²∅)

= 0

Answer 2

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