Question

Sin
²A=1 please answer​

Answer 1

Answer:

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$\sin{^2}A = 1 - cos{^2}A$

or

$sin{^2}A + cos{^2A} = 1$

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Answer 2

Answer:

sin² A + cos² A = 1

but, sin² A = 1 - cos² A

so if Angle A = 90°

Then sin²A = sin² 90° = 1

cos ² A = cos ² 90°= 0 ---(i)

Therefore,

sin² A + cos² A =1

sin² A + cos² 90°= 1 [Taking Angle A = 90°]

Putting the values from eqn (ii),

sin² A + 0 = 1

sin² A = 1 [proved]

Explanation:

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