Question

Prove that :

(Question attached)​

Answer 1

Step-by-step explanation:

sec^2 a = 1+ tan^2 a

sec^6 a =(sec^2 a)^3

=(1+ tan^2 a)^3

=1^3 + (tan^2 a)^3 + 3*1* tan^2 a(1+ tan^2 a)

=1+tan^6 a + 3*tan^2 a * sec^2 a

proved

..............

Answer 2

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Answer:

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