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- June 7th 2008, 09:42 PM #1

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## cos35sin55 + cos55sin35

ok the answer 1 apparently because i went on hotmath.com and it explained it like this

cos35sin55 + cos55sin35

sin^2 55 + cos ^2 35 =1

ok i understand that

but cos35 and sin 55 are equal and so are cos55 and sin35

so i thought it would be like...1 + 1...i dont understand why that isn't correct.

- June 7th 2008, 09:49 PM #2

- June 7th 2008, 09:50 PM #3

- June 8th 2008, 07:30 AM #4

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Hello, desperate_on_sunday_night!

ok the answer 1 apparently because i went on hotmath.com and it explained it like this

ok i understand that . . . . you do?

We're expected to visualize this right triangle . . .Code:* * * c * 55° * * * a * * * 35° * * * * * * * * b

. We have: .

Substitute: .