SOLUTION: 1. if sin 21 degree = x/y, then sec 21 degree - sin 69 degree is equal to ? 2. if Sec A + tan A = 2, then the value of Sin A is ( assume that 0<A<90 degree) is ?

Algebra ->  Trigonometry-basics -> SOLUTION: 1. if sin 21 degree = x/y, then sec 21 degree - sin 69 degree is equal to ? 2. if Sec A + tan A = 2, then the value of Sin A is ( assume that 0<A<90 degree) is ?       Log On


   

Question 974459: 1. if sin 21 degree = x/y, then sec 21 degree - sin 69 degree is equal to ?
2. if Sec A + tan A = 2, then the value of Sin A is ( assume that 0
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
#1:

The IF condition is unimportant.
sin%2821%29-sin%2869%29
0.35836794954530027348413778941347-0.93358042649720174899004306313957
or using six significant figures,
0.358368-0.933580
-0.575212