Question

Evaluate: 3sin²60+4cos²30-sec²60-cosec²45

Answer 1

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-3/4

Answer 2

Answer:

-3/4

Step-by-step explanation:

because :- sin 60°=√3/2

cos 30°=√3/2

sec 60°=2

cosec 45°=√2

therefore,

3×(√3/2)²+4×(√3/2)²-(2)²-(√2)²

3×3/4+4×3/4-4-2

9/4+3/1-4/1-2/1=9+12-16-8/4

=21-24/4=-3/4

hope this will help:)