sin40sec50+cos40cosec50=2
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Answer:
sec50
∘
sin40
∘
+cos40
∘
cosec50
∘
=sec(90
∘
−40
∘
)sin40
∘
+cos40
∘
cosec(90
∘
−40
∘
)
=cosec40
∘
sin40
∘
+cos40
∘
sec40
∘
=
sin40
∘
sin40
∘
+
cos40
∘
cos40
∘
=1+1=2
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