Question

if sin² A = 1, then the value of sin²a - cos² a is?

A) 1
B) 0
C) 2
D) None of the above


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Answer 1

Answer:

1

Step-by-step explanation:

because w.k.t, sin²a + cos²a = 1

thus cos²a = 1 - sin²a

therefore sin²a - cos²a can be written as

sin²a - 1 + sin²a

= 1

Answer 2

the answer is 1 ie option A hope it helps