Question

Evaluate 7 Sin ²45 + Cosec²60 - 2tan²30​

Answer 1

Step-by-step explanation:

we have

7 sin²45+ cosec²60-2tan²30

so we just put the value of these trigonometry ratio

7×(1/√2)²+(2/√3)²-2(1/√3)²

7×1/2+4/3-2×1/3

7/2+4/3-2/3

so we take lcm of 2,3and 3 is 6

now , (21+8-4)/6

25/6

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