Guest

What is the value of sinA cosA(90 - A) = cosA sinA(90 - A)

What is the value of sinA cosA(90 - A) = cosA sinA(90 - A)

Grade:10

1 Answers

Arun
25750 Points
6 years ago
Dear Anu
 
As we know
Cos(90-A) = sinA
While
sin(90-A) = cosA
Hence
SinA * sinA = cosA * cosA
sin²A = cos²A
tan²A = 1
A = 45°
 
Regards
Arun (askIITians forum expert)

Think You Can Provide A Better Answer ?

ASK QUESTION

Get your questions answered by the expert for free