How do we evaluate Sin 10 - Cos 10?
regards
How do we evaluate Sin 10 - Cos 10?
regards
Chandran Ramaswamy , 12 Years ago
Grade 12
Trigonometry> sin-10-cos-10...
1 Answersruchi yadav
Question should besin 20 cos 10 + cos 20 sin 10
remember sin (a+b) = sin a cos b + cos a sin b ?
sin 20 cos 10 + cos 20 sin 10
= sin (20+10)
= sin 30
= 1/2
sin 20 cos 10 + cos 20 sin 10
= sin (20+10)
= sin 30
= 1/2
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