Sec^2 x - 1 = tan^2x
Proof:
Sec^2x = 1+ tan^2x
1/cos^2x = 1 + sin^2x/cos^2x
<span>1/cos^2x - sin^2x/cos^2x = 1
</span>Using common denominator:
(1-sin^2x)/cos^2x = 1
sin^2x + cos^2 x = 1
cos^2 x = 1 - sin^2x
Substituting :
cos^2x/<span>cos^2x = 1
</span>1 = 1
Left hand side = right hand side
Answer:
2
Step-by-step explanation:
As per the interval, x = 1 and y = 5/2
<u>Substitute x into the expression:</u>
3 - 1 = 2
Answer:
hb Step-by-step explanation:
These are the the letters that look the same when reflected across the line B,C,D,E,H,I,K,O,X
