Evaluate:cos100sin800+sin590sec310

cos100sin800+sin590sec310=cos100sin(900−100)+sin(900−310)sec310=cos100cos100+cos310cos310=1+1=2.

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Evaluate: {80^{0}}{10^{0}}+59^{0}31^{0}

Question

Evaluate:
$\frac{sin 8 0 ^{0}}{cos 1 0 ^{0}} + sin 5 9^{0} sec 3 1^{0}$

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Jack Discussed

Evaluate:

\frac{sin 8 0 ^{0}}{cos 1 0 ^{0}} + sin 5 9^{0} sec 3 1^{0}

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10 mins ago

\frac{sin 8 0 ^{0}}{cos 1 0 ^{0}} + sin 5 9^{0} sec 3 1^{0}

= \frac{sin ( 9 0 ^{0} - 1 0 ^{0} )}{cos 1 0 ^{0}} + sin (9 0^{0} - 3 1^{0}) sec 3 1^{0}

= \frac{cos 1 0 ^{0}}{cos 1 0 ^{0}} + \frac{cos 3 1 ^{0}}{cos 3 1 ^{0}}

= 1 + 1 = 2

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