Math, asked by sumitsen42, 19 days ago

if sinA=1/2,then the value of 3cosA-4cos³A is:

Answers

Answered by suyashpratap9453

1

Answer:

0

Step-by-step explanation:

sin A =1/2

A = 30 DEGREE

HENCE , PUTTING THE VALUE OF A

= 3COS 30 DEGREE - 4COS^3 30 DEGREE

= 3*SQUARE ROOT OF 3/2 - 4(SQUARE ROOT OF 3/2)^3

= 0

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