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How to solve trignometric identities. how can we know that which trig identities are to be used while solving problems

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by ankitamaurya

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by ankitamaurya

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1. tan = sin/cos

2. 1 - sin square = cos square

3. 1 - cos square = sin square

you can understand in different ways you can learn them by yourself while learning

1) sin²-cos²=1

2)1+tan²=sec²

3)1+cot²=cosec²

you can learn these and all other can be framed by these 3