Math, asked by akmalkhan0607, 11 months ago

Taking Q=30° verify that cos3Q=4cos³Q-3cosQ

Answers

Answered by harryoms

1

Answer:

cos3Q = 4cos^3Q-3cosQ

is formula of cos3x

Attachments:

Answered by ambitioncentre21

2

cos 90. = 4.cos3 .30-3cos Q

0=0 proved

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