Question

Evaluate Cos 77 / sin13 + Sin²52 +Sin²38 - 3 tan²45

Answer 1

Answer:

-1

Step-by-step explanation:

Cos 77 / sin13 + Sin²52 +Sin²38 - 3 tan²45

cos(90°-13°)/sin13° +sin^2 52°+sin^2 (90°-52°) -3(1)

1+1-3

= -1

Answer 2

Answer:

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