If cos- -cos- - 12 and sin- - sin- - 13

cosα + cosβ = 1/2 ⇒ 2 cos (α + β2 ) cos (α β2 ) = 12 ........ (1) sinα + sinβ = 1/3 ⇒ 2 sin (α + β2 ) cos (α β2 ) = 13 ........ (2) divi ...

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Sum of Trigonometric Ratios in Terms of Their Product

If cosα +co...

Question

If $cos α + cos β = \frac{1}{2}$ and $sin α + sin β = \frac{1}{3}$

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sin α + sin β = a

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