Question

SinA - CosA = (√3 - 1 ) / 2
Find 1. SinA.CosA
2. SinA + CosA

Answer 1

Hey here is your answer
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SinA - CosA = (√3 - 1 ) / 2
SinA - CosA = √3/2 - 1 / 2
SinA - CosA = Sin30°-Cos30°
:. SinA = Sin30°
and CosA = Cos30°

then,
1. SinA.CosA
= Sin30°.Cos30°
= 1/2 × √3/2
= √3/4

2. SinA + CosA
= √3/2 × 1 / 2
= (√3 + 1 ) / 2
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