Answer to Question #75577 in Trigonometry for Bridget

Question

(1) Evaluate exactly tan (Arccos 2/3)

(2) Evaluate exactly cos (Arcsin 1 + Arccos 1/2)

(3) Determine arcsin 1/√2
Careful: that is arcsin and not Arcsin, so there are going to
be infinitely many answers. You need to give all of them.

(4) Evaluate exactly sin( 1/2 Arcsin 4/5)

(5) Use a calculator to determine Arctan 10 in radians to two decimal places.