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Mathematics, 08.06.2021 01:20 Farhan54019

Trigonometry. Brainliest to the one who gets ALL of them correct! NEED HELP ASAP Verify these Identities:

1. cosx−cosxsin²x = cos³x

2. \frac{sinx}{1+cosx} = \frac{1-cosx}{sinx}

3. \frac{1}{1+cosa}+\frac{1}{1-cosa} = 2+2cot²a

4. cos⁴b−sin⁴b = 1−2sin²b

5. \frac{siny+cosy}{siny}- \frac{cosy-siny}{cosy} = \frac{secy}{cosy}

6. (secx−tanx)² = \frac{1-sinx}{1+sinx}

HELP!!!

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