Question #9672

sin α = 4/5, α lies in quadrant II
cos β = 5/13, β lies in quadrant I
find the exact value of the following
1. cos (α + β)
2. tan (α - β)
3. sin 2α
4. cos β/2
verify each identity
9. cos (θ + (π/2)) = -sinθ
10. (sin (α - β))/(sin α cos β) = 1 - cot α tan β
11 sin t cos t(tan t + cot t) = 1
solve each equation on the interval [0,2π)
12. sin 3x = -1/2
13. sin 2x + cos x = 0
14. 2 sin^2 x + cos x = 1
15. 2 cos^2 x - 3 cos x +1 = 0
16. cos x = -0.092
17. tan x sec x = 3 tan x
18. tan^2 x - 3 tan x - 2 = 0

Expert's answer

Unfortunately, your question requires a lot of work and cannot be done for free.

Submit it with all requirements as an assignment to our control panel and we'll assist you.

Submit it with all requirements as an assignment to our control panel and we'll assist you.

## Comments

## Leave a comment