Question

Guys please help me...How did this happen l want explanation. ..​

Answer 1

Answer:

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Answer 2

Answer:

a) 1/√2

Step-by-step explanation:

tanA = 1

so, this condition is possible only when A = 45°

becoz,

tan45° = 1

so, now cosA becomes cos45°

and the value of cos45° is 1/√2