Question

Sin 2 60- cos 2 45+3tan 2 30

Answer 1

mark it as brainliest

Answer 2

Answer :

We know that.

    sin 60 = √3/2

    cos 45 = 1/√2

    tan 30 = 1/√3

∴ sin²60 - cos²45 + 3 tan²30

    = (√3/2)² - (1/√2)² + 3 (1/√3)²

    = 3/4 - 1/2 + 3 (1/3)

    = 3/4 - 1/2 + 1

    = (3 - 2 + 4 )/4

    = 5/4

#MarkAsBrainliest