## my-geek-pride Use trig identites to transform the left side of equation into the right. (1+cos theta)(1-cos theta)= sin^2theta 7 months ago 7 months ago

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1. AravindG

1+cos theta =2cos^2 theta/2

2. satellite73

multiply on the left, and get $1-\cos^2(\theta)$ then it should be easy enough

3. AravindG

1-cos theta=2sin^2 theta/2

4. satellite73

is it clear that $1-\cos^2(\theta)=\sin^2(\theta)$?

5. my-geek-pride

ooohh. yea. I see.

6. satellite73

kk good

7. my-geek-pride

thank you(:

8. satellite73

yw

9. goformit100

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