prove that sin 105°+cos105° = cos45°
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sin 105°= sin (60°+45°)
sin 60° cos 45° + cos 60° + sin45°
√3/2 * 1/√2 + 1/2+1/√2
√3+1/2√2
similarly find cos105°
write lhs=rhs
hence is proved
I hope is helps you
sin 60° cos 45° + cos 60° + sin45°
√3/2 * 1/√2 + 1/2+1/√2
√3+1/2√2
similarly find cos105°
write lhs=rhs
hence is proved
I hope is helps you
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