Is it true that the sum of squares of sines of all angles of a right angled triangle is equal to 2. If yes then how to prove.

Dear Nirabhra

As angles of right angle triangle are 90,a,b

(sin90)2+(sin a)2+(sin b)2

=1+(sin a)2+(sin (90-a))2

=1+(sin a)2+(cos a)2

=1+1

=2

All the best.

AKASH GOYAL

AskiitiansExpert-IITD

Please feel free to post as many doubts on our discussion forum as you can. We are all IITians and here to help you in your IIT JEE preparation.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..