Question

10×1-cot square 45/1+sin square 90

Answer 1

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Answer 2

Answer:

The correct answer to this question is:

(10 * 1 - (cot²(45))) / (1 + sin²(90)) = 9/2

Step-by-step explanation:

Given that,

(10 * 1 - (cot²(45))) / (1 + sin²(90))

$= (10 * 1 - (cot^{2}(45)) ) / (1 + sin^{2}(90))\\\\= (10 - 1 )/ (1 + 1^{2})\\\\= 9 / (1 + 1)\\\\= 9 / 2$           ( ∵ cot 45° = 1 and sin 90° = 1)

Hence, the final answer is -

(10 * 1 - (cot²(45))) / (1 + sin²(90)) = 9/2

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