Question

if tan square theta =2tan square phii +1. then cos2theta+sin2phi​

Answer 1

Answer:

1

Step-by-step explanation:

given tan²a=2tan²π+1

as, tan²π=0

tan²a=1

a=45°

asked, cos2a+sin2a

cos2(45°)+sin2(45°)

cos90°+sin90°

0+1

=0