Question

4 sin square(45°)-1=​

Answer 1

Question.

➝$\sf\green{ 4×( 1/ √2)^2 - 1 }$

Solution.

value of sin45° = 1/√2

➝$\sf\green{ 4×( 1/ √2)^2 - 1 }$

➝$\sf\green{ (4 × 1/2 )- 1}$

➝$\sf\green{ 2 - 1 = 1 }$