Question

Solve to find the value of -sin²54°+sin²36°/cos²57°+cos²33° +2tan48°tan23°tan45°tan42°tan67°

Answer 1

sin²54°+cos²(90°- 36°)/cos²57°+sin²(90°-33°)+
2tan48°tan23°tan45°cot(90°-42°)cot(90°-67°)=
sin²54°+cos²54°/cos²57°+sin²57°+2tan48°tan23°*1*1/tan48°*1/tan23°
=1+2=3

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Answer 2

Answer:

find the value of sin²54+sin²36