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Tuesday, October 22, 2019

solution video to find cos(a+b)

$if \; sin\:\alpha =\frac{3}{5}\: , \frac{\pi }{2}\leq \alpha \leq \pi \:and\; cos\:\beta \frac{-12}{13}\:,\pi \leq \beta \leq \frac{3\pi }{2}$

$find\;the\;value\;of\;cos\:(\alpha +\beta )$

Posted by Kuckoo at 1:47 AM

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Tuesday, October 22, 2019

solution video to find cos(a+b)

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