Question

Which of the following is an identity?
1 point
sin a(sin a) - 1 = cos a (- cos a)
O sin a + cos a = 1
O sin(-a)
= sin a
ОО
tan a = cos a / sin a
a​

Answer 1

Answer:

sinA + cosA = 1

Step-by-step explanation:

sinA + cosA = 1

[squaring both sides]

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

Thus ur answer is b)

Brainliest me :)

Good DaY!

Answer 2

Answer:

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