Question

sec2 85 - 1/cot2 85
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Answer 1

Answer:

1

Step-by-step explanation:

1/cos^2(85) - sin^2(85)/cos^2(85) (1/cots = tanx, tanx = sinx/cosx)

= 1-sin^2(85) ÷ cos^2(85) (since bases are same)

= cos^2(85) ÷ cos^2(85) ( formula, 1-sin^2(a) = cos^2(a) )

= 1

HOPE THIS HELPS YOU......