Trigonometry Grade 12: Simplify

In this lesson we simplify a grade 12 trigonometry expression

[suhailraja]

I don't understand when you changed -sin10^2 to positive sin10^2
why couldn't you just change the -cos10^2 to positive instead of pulling out a negative as a common factor?

[zuko]

5:47 You could've also said cos35 sin35 = 1/2 sin70. Great video BTW! !!

[jabulilethwala]

This was an amazing video sir...I really enjoyed it👍

[zackyboi]

@6:00 what happened to the cos55 after multiplying by 2?