Question

SinA-cos²B=sin²B-cos²A

Answer 1

Answer:

hope it helps you

Answer 2

Answer:

Step-by-step explanation:

Sin a + cos^2 a=Sin^2 b+cos^2 b

Sin a +cos^2 a=1

Sin a =1- cos^2 a

Sin a =Sin^2 a

Sin ^2 a -sin a=1

Sin a(sin a-1)=1

Sin a =1

a=90

or

Sin a =2

a=270