Without using trigonometric tables, evaluate the follow
${s i n}^{2} 35^{0} + {s i n}^{2} 55^{0}$

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Solution

We have the equation is,

$s i n^{2} 35^{0} + s i n^{2} 55^{0}$

$= [s i n (90^{0} - 55^{0})]^{2} + s i n^{2} 55^{0}$

$= c o s^{2} 55^{o} + s i n^{2} 55^{0}$

$= 1$

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Without using trigonometric tables, evaluate the follow sin2350+sin2550

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Without using trigonometric tables, evaluate the follow
${s i n}^{2} 35^{0} + {s i n}^{2} 55^{0}$

We have the equation is,

$s i n^{2} 35^{0} + s i n^{2} 55^{0}$

$= [s i n (90^{0} - 55^{0})]^{2} + s i n^{2} 55^{0}$

$= c o s^{2} 55^{o} + s i n^{2} 55^{0}$

$= 1$