Please help me on these questions, thanks.

(a) Explain how to derive the double angle formula for tangent using the angle sum formula tan A + tan B for tangent. tan(A + B) m. (b) Verify the trig identity 1 | cot2 0 = csc2 9. Explain your steps. . . . b ' C (c) Explain how to derive the formula for SAS trlangle area: Area = a 3:1 . (d) Explain how to simplify sin (arctan g) and cos (arctang), if 6 = (c,d) in Cartesian coordinates. (e) Find the value of c such that f (cc) = 53:2 409: -| c is a perfect square. Explain your steps. (f) Explain Why the linear system 23: y = 3, 6x 33; = 1 has no solutions