Question

If Sin2a = Cosa, then a is 45°

True or False.(Please explain your answer)

Answer 1

False
Sin 2*45=sin90=1
Cos45=1/ rrot2
Sin2A not equalcosA

Answer 2

false
sin2a=cosa
sin2(45)
sin90=1

BT
cos45
= 1/ Root 2