Question

Evaluate the following: sin²30° - cos²45° + tan²60°​

Answer 1

Answer:

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Answer 2

Sin²30° - cos²45° + tan²60°

Using Trigonometry table

we know

Sin 30° = 1/2

Sin 30° = 1/2Cos 45° = 1/√2

Sin 30° = 1/2Cos 45° = 1/√2Tan 60° = √3

Putting the value

(1/2)²-(1/√2)²+(√3)²

(1/4)-(1/2)+(3)

(-1/4)+3

= 11/4

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