1.

Sin square 30 -cos square 60

Answer»

Answer:

0

Step-by-step explanation:

sin and cos are COMPLEMENTARY RELATIONS, i.e sinθ = cos(90°-θ)

So, we can say that

sin30° = cos(90°-30°) = cos60°

In the GIVEN expression,

sin²30° - cos²60°

= (sin30°)² - (cos60°)²

= (sin30°)² - (sin30°)²

=0



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