Trigonometry

See attach file. Thanks.

Trigonometry

Find the value of x (in degrees) for: cos(6x+5) = 1/sec(4x+15) sec(2x+6)*cos(5x+3)=1

Acute Angles and Right Triangles

Find the exact value of each [side] labeled with a letter {see attachment for diagram}

sum and difference identities

Find the coordinates of P(π/12) x = (1+√3)/(2√2) To find the y-coordinatem you use the identity: sin(α - β) = (sinα)(cosβ) - (cosα)(sinβ) why do we use this identity? eg, why dont we use sin(α + β) = (sinα)(cosβ) + (cosα)(sinβ) ?? *PLEASE* explain why this is, as my math course doesnt explain things very well, i need to know WHY in order to understand the work.

Trigonometry

See attach file. I just want to make sure I have the correct answers. I just need the answers only. Thanks.