Math, asked by manjushukla499, 2 months ago

cos65°×cos25°-sin65°×sin25°

Answers

Answered by luckylakshmi298

0

Answer:

sin25

∘

cos65

∘

+cos25

∘

sin65

∘

=sin25

∘

sin(90

∘

−65

∘

)+cos25

∘

cos(90

∘

−65

∘

)

=sin25

∘

sin25

∘

+cos25

∘

cos25

∘

=sin

2

25

∘

+cos

2

25

∘

=1

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