Question

If 2sin2β – cos2β = 2, then β is​

Answer 1

Answer:

90 degree

Step-by-step explanation:

I think so

please mark as brainliest

Answer 2

Answer:

pls mark me as the brainliest:)

Step-by-step explanation:

sin ^ 2 beta + cos ^ 2 beta = 1. ...(i)

2sin^2beta - cos^2beta= 2

or 2sin^2 beta= 2+ cos^2 beta = 2*1 + cos^2 beta

or 2sin ^ 2 beta = 2 (sin ^ 2 beta + cos ^ 2 beta) + cos ^ 2 beta

or 2sin^2 beta= 2sin^2 beta + 3cos^2 beta

or 3cos^2 beta = 0

or √3 cos beta = 0

or cos beta= 0

according to trigonometric tables, cos 0= 90°