Guest

In trigonometry how we have to be prove that the sin(90_theta)=cos theta

In trigonometry how we have to be prove that the sin(90_theta)=cos theta

Grade:9

1 Answers

Arun
25750 Points
6 years ago
Dear student
sin (90-theta) = cos theta 
sin 90 - sin theta = cos theta 
sin 90 =1 
1 - sin theta = cos theta 
in rule: cos theta + sin theta = 1 
cos theta = 1 - sin theta 
cos theta = cos theta
Regards
Arun (askIITians forum expert)

Think You Can Provide A Better Answer ?

ASK QUESTION

Get your questions answered by the expert for free