if sec A= 5/4 prove that Cos^2 A=1-sin^2 A
Answers
Answered by
2
Answer:
cos²A + sin²A is always one
Step-by-step explanation:
cos²A = b²/h²
sin²A= p²/h²
now we get
p²+b²/h². (p²+b²=h²)
then h²/h²
so answer is 1
Answered by
2
Step-by-step explanation:
1-sin²A=sin²+cos²A-sin²A
=cos²A(proved)
Similar questions