Question

Please someone helppp

Answer 1

Explanation:

5)

sin2a=2sina.cosa

Subtitute values in formula:

sin2a=2(3/8)(5/8)

sin2a=30/64

6)

cos2∅=2cos²∅-1

=2(5/3)²-1

=2(25/9)-1

=50/9-1

=50-9/9

=41/9

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