Question

2. (sec A + tan A) (1 - sin A)
TA​

Answer 1

Step-by-step explanation:

=(SecA + tanA) (1-SinA)

=(1/CosA+SinA/CosA) ( 1-SinA)

=(1+SinA/CosA) (1-SinA)

=1-Sin^2A/CosA

=Cos^2A/CosA

=CosA

【Identity Used:- 1. SecA = 1/CosA

2. tanA = SinA/CosA

3. (a+b)(a-b) = a^2-b^2

4. 1-Sin^2A = Cos^2A

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