Question

14. If A=45°, verify that cos 2A= 2cos^ A – 1 = 1 – 2 sin^A

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Answer 1

Answer:

If A=45∘, verify that: cos2A=2cos2A−1=1−2sin2A. · Answer · A=45∘ then 2A=90∘ cos2A=cos90∘=0 2cos2A−1=2cos245∘−1 =2(2 ​1​)2−1=1−1=0 1− ...

Step-by-step explanation: