Question

FIND VALUE OF SIN SQUARE 18 -COS SQUARE 72

Answer 1

Answer:

0 ( zero )

Step-by-step explanation:

Sin square 18 - cos square 72

= sin square 18 - sin square (90- 72)

( sin and cos are complementary ratios sum of whose angle is 90°

i.e. Cos theta = sin ( 90° - theta ) )

= sin square 18 - sin square 18

=0

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