Answer:
O7v2 hope that helps ya! Mark as brainlest
Answer:triangles 20 12 28 and15 9 21
Step-by-step explanation:
I'm sorry if I wasn't there to help but thank the others, and thank you :)
Answer:
see explanation
Step-by-step explanation:
Using the trigonometric identities
1 + tan²A = sec²A , secA =
, cosecA =
, cotA =
, tanA = 
Consider the left side

= 
= 
= 
=
× sin²A
= 
= tanA = right side , thus proven