- #1
Aikon
- 21
- 0
Hi all,
I work as monitor for a pre-university course and one student showed me this problem:
To find how much is y:
y=sin2(10)+sin2(20)+sin2(30)+...+sin2(80)+sin2(90)
I don't know. I thought about sen2x+cos2x=1
To use the equation given above and to write a series of cos()'s, but i don't think it get better than before.
I work as monitor for a pre-university course and one student showed me this problem:
Homework Statement
To find how much is y:
y=sin2(10)+sin2(20)+sin2(30)+...+sin2(80)+sin2(90)
Homework Equations
I don't know. I thought about sen2x+cos2x=1
The Attempt at a Solution
To use the equation given above and to write a series of cos()'s, but i don't think it get better than before.