Question

Evaluate : (sin 77/cos 13)
+ sin² 42 - cos^2 48 - 3 cot 45​

Answer 1

Answer: sin77/cos13+(sin42)^2+(sin48)^2-3(tan45)^2

=sin77/cos77+(sin42)^2+(sin42)^2-3

=1+1-3

=-1

Step-by-step explanation:

Answer 2

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