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 ?

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 ?

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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) (Show Source): You can put this solution on YOUR website!
#1:

The IF condition is unimportant.

or using six significant figures,

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