find value of sin²56+ sin²36
Answers
Answered by
0
sin
2
34
∘
+sin
2
56
∘
+2tan18
∘
tan72
∘
−cot
2
30
∘
=sin
2
34
∘
+sin
2
(90
∘
−34
∘
)+2tan18
∘
tan(90
∘
−18
∘
)−cot
2
30
∘
=sin
2
34
∘
+cos
2
34
∘
+2tan18
∘
cot18
∘
−(
3
)
2
=1+2tan18
∘
×
tan18
∘
1
−3
=1+2−3
Similar questions