Question

(1) 2 sin²30° + 2 tan²60° – 5 cos² 45º = 4

plz ans this question and the ans should be correct
the ans is 4​

Answer 1

Answer:

2 sin²30° + 2 tan²60° – 5 cos² 45º

2(1/2)² + 2(√3)² - 5(1/√2)²

2×1/4 + 2×3 - 5/2

1/2 + 6 - 5/2

6 - 5/2 + 1/2

6 - 4/2

6-2

4

Answer 2

fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact

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