Question

prove that : Cos²∅ (1+ tan²∅)=1​

Answer 1

Step-by-step explanation:

hope this helps your study

Answer 2

Answer:

ok so we know that 1+ tan²x = sec²x

so your question becomes cos²x sec²x

and now sec²x = 1/cos²x

so it becomes cos²x / cos²x = 1 hence proved ...