Question

Q5.
5. If a=sin 170° + cos 170° then
1) a > 0
2) a < 0
3) a=0
4) a= 1
Answer:
O 1
2
3
4​

Answer 1

Answer:

option 2 it correct answer I hope this helps you and follow me fast to get best answer

Step-by-step explanation:

Given,

a=sin170o+cos170o

=sin(180−10)+cos(180−10)

=sin10+(−cos10)

=sin10−cos10

Now if θ∈(0,4π)

cosθ>sinθ

∴cos10o>sin10o

∴a=sin10−cos10

=−ve

∴a<10.