Question

2. If cos A + cos²A = 1, then the value of sin2A + sin4A is
(A)-1 (B)0
(C)1
(D) 2
14587​

Answer 1

Step-by-step explanation:

ismein Se Kya batana Hai yah to bata do

Answer 2

Answer:

(c) 1

Step-by-step explanation:

cos A + cos^2 A =1

cos A +1-sin^2 A =1

Cos A - sin^2 A =0

cos A = sin^2 A

sin^2 A +sin^4 A =cos A+ cos^2 A = 1

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