Question

Evaluate: 4( sin²30⁰ - cos⁴60⁰) -9 (cos²45⁰ - sin²90⁰)​

Answer 1

Answer:

10/2

Step-by-step explanation:

4( (1/2)² - (1/2)^4)-9((1/√2)²-1²)

4(1/4-1/8) - 9(1/2-1)

Taking the LCM,

4(2-1/8) -9(1-2/2)

4(1/8) -9(-1/2)

After multiplying,

1/2-(-9/2)

1/2+9/2

10/2

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Answer 2

Answer:

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