What is sin2 (3 π) + cos2 (4 π) + tan2 (5π) equal to ?

What is  sin2 (3 π)  + cos2 (4 π)  + tan2 (5π) equal to ?

  1. 0
  2. 1
  3. 2
  4. 3
Manish Listener Asked on 25th July 2015 in Maths.
Add Comment
1 Answer(s)

Answer: (2) 1
Explanation:-
sin2(3 π ) + cos2 (4 π ) + tan2 (5  π )
= sin2 (3 x 180) + cos2 (4 x 180) + tan2 (5 x 180)
= sin2 (360 + 180) + cos2 ( 360 + 360 ) + tan2 ( 2 x 360 + 180)
= sin2 180 + cos2 360 + tan2 180
= (0)2 + (1)2 + (0)2
 = 0 + 1 + 0
= 1
Hence, the answer is (2) 1.

Anurag Mishra Professor Answered on 25th July 2015.
Add Comment

Your Answer

By posting your answer, you agree to the privacy policy and terms of service.