Question

tan ²63 - Sec square 63​

Answer 1

Answer:

-1

Step-by-step explanation:

We know that 1+tan²a=sec²a

Thus sec²a-tan2a=1

thus tan²a+sec²a=-1

on substituting a=63°

we get tan²63°-sec²63°=-1

Please mark my answer brainliest.