Question

sin² 30 + cos² 60 - sin² 45 = ?
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Answer 1

Answer:

value of sin 30 is 1/2, cos 60 is 1/2 and sin 45 is1/√2

now we put the value

(1/2) ^2+(1/2) ^2-(1/√2) ^2

1/4+1/4-1/2

2/4-1/2

2-1/2

3/2 is correct answer

Answer 2

Answer:

0

Step-by-step explanation:

sin 30° = $\frac{1}{2}$

cos 60° = $\frac{1}{2}$

sin 45° = √2 / 2

(1/2)² + (1/2)² - (√2/2)²

1/4 + 1/4 - 1/2 = 0

sin² 30 + cos² 60 - sin² 45 = 0