I need some help here to verify my answers Thank you in adva

I need some help here to verify my answers. Thank you in advance!

Solution

cot=-2

tan=1/cot =-1/2

sin=5 /5 =1/5

csc=1/sin=5

cos=sin/tan=(1/5)/(-1/2)=-2/5

sec=1/cos =-5 /2

.................................................

sinx -1=0

sinx =1

x =pi/2

..................................

2tan²(y)x(csc²(y) -1)

2(sin²(y)/cos²(y))x((1/sin²(y)) -1)

2(sin²(y)/cos²(y))x((1-sin²(y))/sin²(y))

2(sin²(y)/cos²(y))x(cos²(y)/sin²(y))

=2