Math, asked by pravinthakar19, 6 months ago

14. If cos A + cos² A=1 then (sin2A + sin4A)= ?
(a)1/2
(b) 2
(c) 1
(d) 4

Answers

Answered by sandy1816

3

Answer:

➡cosA+cos²A=1

➡cosA=1-cos²A

➡cosA=sin²A

⏩sin²A+sin⁴A

=cosA+cos²A

=1

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